division sign \ div is displayed as\ nabla when using ctex

[sqz-07040120]

Description of bug / unexpected behavior

I use ctex to display Chinese in latex, but there is a problem with the display of Chinese and division marks
![Image](https://github.com/user-attachments/assets/1051b801-c424-4879-ab70-e2a24532d24e
The Chinese display has some connections that should not exist, such as "展", "示", "四", and "运" in the picture.

The division sign is displayed as shown in the figure

Expected behavior

The correct Chinese display should be like this.

The correct \div display should be like this.(I achieve this effect by deleting this sentence "config.tex_template = TexTemplateLibrary.ctex", i.e. without using ctex.)

How to reproduce the issue

Code for reproducing the problem

from manim import *
from manim_voiceover import VoiceoverScene

config.tex_template = TexTemplateLibrary.ctex
config["background_color"] = BLACK

class FourBasicOperations(Scene):
    def construct(self):
        # 标题
        title = Text("你好，今天我们使用manim来展示四则运算", font_size=48, color=WHITE)
        self.play(Write(title))
        self.wait(1)
        self.play(FadeOut(title))

        add_exp = MathTex("2 + 3 = 5", color=GREEN)
        sub_exp = MathTex("5 - 2 = 3", color=BLUE)
        mul_exp = MathTex("3 \\times 4 = 12", color=RED)
        div_exp = MathTex("12 \\div 3 3 = 4", color=PURPLE)

        expressions = VGroup(add_exp, sub_exp, mul_exp, div_exp).arrange_in_grid(
            rows=2, cols=2, buff=1.0
        )

        # 逐个显示运算
        self.play(Write(add_exp))
        self.wait(0.5)
        self.play(Write(sub_exp))
        self.wait(0.5)
        self.play(Write(mul_exp))
        self.wait(0.5)
        self.play(Write(div_exp))
        self.wait(2)

manim -pql question_video.py FourBasicOperations --disable_caching

Additional media files

Images/GIFs

FourBasicOperations.mp4

Logs

Terminal output

Manim Community v0.18.0

[05/04/25 21:26:13] INFO     Caching disabled.                                                                                                                                             cairo_renderer.py:68
                    DEBUG    List of the first few animation hashes of the scene: ['uncached_00000']                                                                                       cairo_renderer.py:87
[05/04/25 21:26:14] INFO     Animation 0 : Partial movie file written in                                                                                                               scene_file_writer.py:527
                             'D:\Teach-With-Video\media\videos\question_video\480p15\partial_movie_files\FourBasicOperations\uncached_00000.mp4'
                    DEBUG    Animation with empty mobject                                                                                                                                      animation.py:174
                    INFO     Caching disabled.                                                                                                                                             cairo_renderer.py:68
                    DEBUG    List of the first few animation hashes of the scene: ['uncached_00000', 'uncached_00001']                                                                     cairo_renderer.py:87
                    INFO     Animation 1 : Partial movie file written in                                                                                                               scene_file_writer.py:527
                             'D:\Teach-With-Video\media\videos\question_video\480p15\partial_movie_files\FourBasicOperations\uncached_00001.mp4'
                    INFO     Caching disabled.                                                                                                                                             cairo_renderer.py:68
                    DEBUG    List of the first few animation hashes of the scene: ['uncached_00000', 'uncached_00001', 'uncached_00002']                                                   cairo_renderer.py:87
                    INFO     Animation 2 : Partial movie file written in                                                                                                               scene_file_writer.py:527
                             'D:\Teach-With-Video\media\videos\question_video\480p15\partial_movie_files\FourBasicOperations\uncached_00002.mp4'
                    INFO     Writing 2 + 3 = 5 to media\Tex\a6f2e838154ec4c1.tex                                                                                                        tex_file_writing.py:107
[05/04/25 21:26:16] INFO     Writing 5 - 2 = 3 to media\Tex\adeeb0386f515e1f.tex                                                                                                        tex_file_writing.py:107
[05/04/25 21:26:18] INFO     Writing 3 \times 4 = 12 to media\Tex\cf00c678d412bfaf.tex                                                                                                  tex_file_writing.py:107
[05/04/25 21:26:19] INFO     Writing 12 \div 3 3 = 4 to media\Tex\7bb91a49ef55fc94.tex                                                                                                  tex_file_writing.py:107
[05/04/25 21:26:21] INFO     Caching disabled.                                                                                                                                             cairo_renderer.py:68
                    DEBUG    List of the first few animation hashes of the scene: ['uncached_00000', 'uncached_00001', 'uncached_00002', 'uncached_00003']                                 cairo_renderer.py:87
                    INFO     Animation 3 : Partial movie file written in                                                                                                               scene_file_writer.py:527
                             'D:\Teach-With-Video\media\videos\question_video\480p15\partial_movie_files\FourBasicOperations\uncached_00003.mp4'
                    DEBUG    Animation with empty mobject                                                                                                                                      animation.py:174
                    INFO     Caching disabled.                                                                                                                                             cairo_renderer.py:68
                    DEBUG    List of the first few animation hashes of the scene: ['uncached_00000', 'uncached_00001', 'uncached_00002', 'uncached_00003', 'uncached_00004']               cairo_renderer.py:87
                    INFO     Animation 4 : Partial movie file written in                                                                                                               scene_file_writer.py:527
                             'D:\Teach-With-Video\media\videos\question_video\480p15\partial_movie_files\FourBasicOperations\uncached_00004.mp4'
                    INFO     Caching disabled.                                                                                                                                             cairo_renderer.py:68
                    DEBUG    List of the first few animation hashes of the scene: ['uncached_00000', 'uncached_00001', 'uncached_00002', 'uncached_00003', 'uncached_00004']               cairo_renderer.py:87
                    INFO     Animation 5 : Partial movie file written in                                                                                                               scene_file_writer.py:527
                             'D:\Teach-With-Video\media\videos\question_video\480p15\partial_movie_files\FourBasicOperations\uncached_00005.mp4'
                    DEBUG    Animation with empty mobject                                                                                                                                      animation.py:174
                    INFO     Caching disabled.                                                                                                                                             cairo_renderer.py:68
                    DEBUG    List of the first few animation hashes of the scene: ['uncached_00000', 'uncached_00001', 'uncached_00002', 'uncached_00003', 'uncached_00004']               cairo_renderer.py:87
                    INFO     Animation 6 : Partial movie file written in                                                                                                               scene_file_writer.py:527
                             'D:\Teach-With-Video\media\videos\question_video\480p15\partial_movie_files\FourBasicOperations\uncached_00006.mp4'
                    INFO     Caching disabled.                                                                                                                                             cairo_renderer.py:68
                    DEBUG    List of the first few animation hashes of the scene: ['uncached_00000', 'uncached_00001', 'uncached_00002', 'uncached_00003', 'uncached_00004']               cairo_renderer.py:87
[05/04/25 21:26:22] INFO     Animation 7 : Partial movie file written in                                                                                                               scene_file_writer.py:527
                             'D:\Teach-With-Video\media\videos\question_video\480p15\partial_movie_files\FourBasicOperations\uncached_00007.mp4'
                    DEBUG    Animation with empty mobject                                                                                                                                      animation.py:174
                    INFO     Caching disabled.                                                                                                                                             cairo_renderer.py:68
                    DEBUG    List of the first few animation hashes of the scene: ['uncached_00000', 'uncached_00001', 'uncached_00002', 'uncached_00003', 'uncached_00004']               cairo_renderer.py:87
                    INFO     Animation 8 : Partial movie file written in                                                                                                               scene_file_writer.py:527
                             'D:\Teach-With-Video\media\videos\question_video\480p15\partial_movie_files\FourBasicOperations\uncached_00008.mp4'
                    INFO     Caching disabled.                                                                                                                                             cairo_renderer.py:68
                    DEBUG    List of the first few animation hashes of the scene: ['uncached_00000', 'uncached_00001', 'uncached_00002', 'uncached_00003', 'uncached_00004']               cairo_renderer.py:87
                    INFO     Animation 9 : Partial movie file written in                                                                                                               scene_file_writer.py:527
                             'D:\Teach-With-Video\media\videos\question_video\480p15\partial_movie_files\FourBasicOperations\uncached_00009.mp4'
                    DEBUG    Animation with empty mobject                                                                                                                                      animation.py:174
                    INFO     Caching disabled.                                                                                                                                             cairo_renderer.py:68
                    DEBUG    List of the first few animation hashes of the scene: ['uncached_00000', 'uncached_00001', 'uncached_00002', 'uncached_00003', 'uncached_00004']               cairo_renderer.py:87
                    INFO     Animation 10 : Partial movie file written in                                                                                                              scene_file_writer.py:527
                             'D:\Teach-With-Video\media\videos\question_video\480p15\partial_movie_files\FourBasicOperations\uncached_00010.mp4'
                    INFO     Combining to Movie file.                                                                                                                                  scene_file_writer.py:617
                    DEBUG    Partial movie files to combine (11 files):                                                                                                                scene_file_writer.py:561
                             ['D:\\Teach-With-Video\\media\\videos\\question_video\\480p15\\partial_movie_files\\FourBasicOperations\\uncached_00000.mp4',
                             'D:\\Teach-With-Video\\media\\videos\\question_video\\480p15\\partial_movie_files\\FourBasicOperations\\uncached_00001.mp4',
                             'D:\\Teach-With-Video\\media\\videos\\question_video\\480p15\\partial_movie_files\\FourBasicOperations\\uncached_00002.mp4',
                             'D:\\Teach-With-Video\\media\\videos\\question_video\\480p15\\partial_movie_files\\FourBasicOperations\\uncached_00003.mp4',
                             'D:\\Teach-With-Video\\media\\videos\\question_video\\480p15\\partial_movie_files\\FourBasicOperations\\uncached_00004.mp4']
                    INFO                                                                                                                                                               scene_file_writer.py:735
                             File ready at 'D:\Teach-With-Video\media\videos\question_video\480p15\FourBasicOperations.mp4'
                    
                    INFO     Rendered FourBasicOperations                                                                                                                                          scene.py:241
                             Played 11 animations
[05/04/25 21:26:23] INFO     Previewed File at: 'D:\Teach-With-Video\media\videos\question_video\480p15\FourBasicOperations.mp4'                                                                file_ops.py:227
                    DEBUG    Connection Error: Cannot check if latest release of manim is installed                                                                                             commands.py:140

System specifications

System Details

• OS: Windows 10 22H2
• RAM:16.0 GB
• Python version:python3.9
• Installed modules :

Package                        Version
------------------------------ ---------------------
absl-py                        0.15.0
aiohttp                        3.9.1
aiosignal                      1.3.1
alabaster                      0.7.12
alfred                         0.3
alfred-py                      2.9.5
alibabacloud-credentials       0.3.2
alibabacloud-darabonba-env     0.0.1
alibabacloud-darabonba-string  0.0.4
alibabacloud-darabonba-time    0.0.1
alibabacloud-dysmsapi20170525  2.0.24
alibabacloud-endpoint-util     0.0.3
alibabacloud-gateway-spi       0.0.1
alibabacloud-openapi-util      0.2.2
alibabacloud-tea               0.3.5


alibabacloud-tea-util          0.3.11
alibabacloud-tea-xml           0.0.2
altair                         4.2.0
altair-data-server             0.4.1
altair-viewer                  0.4.0
altgraph                       0.17.2
annotated-types                0.7.0
anyio                          4.6.2.post1
appdirs                        1.4.4
arabic-reshaper                3.0.0
argon2-cffi                    21.3.0
argon2-cffi-bindings           21.2.0
asgiref                        3.8.1
asn1crypto                     1.5.1
astor                          0.8.1
asttokens                      2.0.5
astunparse                     1.6.3
async-generator                1.10
async-timeout                  4.0.3
atomicwrites                   1.4.1
attention                      4.1
attrs                          25.3.0
Authlib                        1.3.2
auto-py-to-exe                 2.34.0
autopep8                       1.7.0
av                             13.1.0
azure-cognitiveservices-speech 1.43.0
Babel                          2.10.3
backcall                       0.2.0
beautifulsoup4                 4.13.3
bleach                         4.1.0
blis                           0.7.9
bootle                         0.1.1
bottle                         0.12.25
bottle-websocket               0.2.9
branca                         0.6.0
Brotli                         1.1.0
cachetools                     4.2.4
catalogue                      1.0.2
certifi                        2025.1.31
cffi                           1.15.0
chardet                        5.2.0
charset-normalizer             2.0.7
clang                          5.0
click                          8.1.7
click-default-group            1.2.4
click-plugins                  1.1.1
cligj                          0.7.2
cloudpickle                    2.0.0
cloup                          2.1.2
colorama                       0.4.4
colour                         0.1.5
commonmark                     0.9.1
comtypes                       1.4.10
ConfigArgParse                 1.7
configparser                   5.0.2
contextlib2                    21.6.0
coremltools                    5.0
coverage                       6.5.0
cozepy                         0.6.2
cryptography                   43.0.3
cssselect2                     0.7.0
cycler                         0.10.0
cymem                          2.0.7
Cython                         0.29.28
debugpy                        1.5.1
decorator                      5.2.1
defusedxml                     0.7.1
Deprecated                     1.2.13
dgl-cu113                      0.9.0
dglgo                          0.0.2
Distance                       0.1.3
distro                         1.9.0
Django                         4.2.20
django-csp                     3.7
django-mathjax                 0.0.8
djangorestframework            3.16.0
djangorestframework_simplejwt  5.5.0
docker-pycreds                 0.4.0
docopt                         0.6.2
docutils                       0.19
easydict                       1.9
edge-tts                       7.0.0
Eel                            0.16.0
en-core-web-sm                 2.3.1
entrypoints                    0.3
exceptiongroup                 1.2.2
executing                      0.8.3
fake-useragent                 0.1.11
filelock                       3.4.2
Fiona                          1.9.4.post1
fire                           0.4.0
Flask                          2.1.3
flask-cors                     5.0.1
Flask-Login                    0.6.3
Flask-SQLAlchemy               2.5.1
flatbuffers                    1.12
folium                         0.14.0
fonttools                      4.28.4
frozenlist                     1.4.1
funcy                          1.17
future                         0.18.2
fuzzywuzzy                     0.8.2
g2p-en                         2.1.0
gast                           0.4.0
gensim                         4.2.0
geopandas                      0.13.2
gevent                         22.10.2
gevent-websocket               0.10.1
geventhttpclient               2.3.3
gitdb                          4.0.9
GitPython                      3.1.24
glcontext                      3.0.0
google-auth-oauthlib           0.4.6
google-pasta                   0.2.0
greenlet                       2.0.2
gTTS                           2.5.4
gunicorn                       21.2.0
h11                            0.14.0
h5py                           3.1.0
hanlp                          2.1.0b45
hanlp-common                   0.0.19
hanlp-downloader               0.0.25
hanlp-trie                     0.0.5
html5lib                       1.1
httpcore                       1.0.6
httplib2                       0.21.0
httpx                          0.27.2
huggingface-hub                0.12.1
hyperopt                       0.1.2
idna                           3.3
image                          1.5.33
imageio                        2.10.1
imageio-ffmpeg                 0.4.8
imagesize                      1.4.1
importlib_metadata             8.6.1
imutils                        0.5.4
inflect                        5.5.2
ipykernel                      6.6.1
ipython                        8.1.1
ipython-genutils               0.2.0
ipywidgets                     7.6.5
iso8601                        1.0.2
isort                          5.10.1
isosurfaces                    0.1.0
itsdangerous                   2.1.2
jedi                           0.18.1
jieba                          0.42.1
Jinja2                         3.1.6
jiter                          0.9.0
joblib                         1.1.0
json_repair                    0.41.0
json-tricks                    3.15.5
jsons                          1.6.1
jsonschema                     4.23.0
jsonschema-specifications      2025.4.1
jupyter                        1.0.0
jupyter-client                 7.1.0
jupyter-console                6.4.0
jupyter-core                   4.9.1
jupyterlab-pygments            0.1.2
jupyterlab-widgets             1.0.2
kaleido                        0.1.0.post1
keras                          2.6.0
Keras-Applications             1.0.8
Keras-Preprocessing            1.1.2
keras2onnx                     1.7.0
kiwisolver                     1.3.2
labelImg                       1.8.6
libclang                       12.0.0
littleutils                    0.2.2
locust                         2.34.0
loguru                         0.5.3
lxml                           4.7.1
Mako                           1.1.5
manim                          0.18.0
manim-voiceover                0.3.7
ManimPango                     0.6.0
mapbox_earcut                  1.0.3
Markdown                       3.3.4
MarkupSafe                     2.0.1
matplotlib                     3.5.1
matplotlib-inline              0.1.3
mistune                        0.8.4
moderngl                       5.12.0
moderngl-window                2.4.4
more-itertools                 9.0.0
moviepy                        1.0.3
mpmath                         1.2.1
msgpack                        1.1.0
multidict                      6.0.4
multipledispatch               1.0.0
murmurhash                     1.0.9
mutagen                        1.47.0
mysqlclient                    2.1.1
natsort                        8.0.2
nbclient                       0.5.9
nbconvert                      6.4.0
nbformat                       5.1.3
nest-asyncio                   1.5.4
networkx                       2.6.3
nl4dv                          2.0.0
nltk                           3.7
nni                            2.6
notebook                       6.4.6
numpy                          1.26.4
numpydoc                       1.4.0
oauthlib                       3.1.1
ogb                            1.3.4
oldest-supported-numpy         0.14
onnx                           1.10.2
onnx-simplifier                0.3.10
onnx2pytorch                   0.4.1
onnxconverter-common           1.9.0
onnxoptimizer                  0.2.6
onnxruntime-gpu                1.11.1
openai                         1.69.0
opencv-python                  4.5.4.60
opendatalab                    0.0.9
opt-einsum                     3.3.0
oscrypto                       1.3.0
outcome                        1.1.0
outdated                       0.2.1
pandas                         1.3.5
pandoc                         2.3
pandocfilters                  1.5.0
parso                          0.8.3
pascal-voc-writer              0.1.4
pathtools                      0.1.2
patsy                          0.5.2
pefile                         2023.2.7
phrasetree                     0.0.8
pickleshare                    0.7.5
Pillow                         9.5.0
Pillow-PIL                     0.1.dev0
pip                            22.1.2
pipreqs                        0.4.13
plac                           1.1.3
plotly                         5.10.0
pluggy                         1.0.0
plumbum                        1.8.2
ply                            3.11
portalocker                    2.3.2
portpicker                     1.5.2
preshed                        3.0.8
prettytable                    3.0.0
proglog                        0.1.10
prometheus-client              0.12.0
promise                        2.3
prompt-toolkit                 3.0.24
psutil                         7.0.0
ptflops                        0.6.7
pure-eval                      0.2.2
py                             1.11.0
pyasn1                         0.4.8
pyasn1-modules                 0.2.8
PyAudio                        0.2.12
pycairo                        1.27.0
pycocotools                    2.0.2
pycodestyle                    2.9.1
pycparser                      2.20
pycryptodome                   3.18.0
pycuda                         2021.1
pycv2                          0.0.1
pydantic                       2.9.2
pydantic_core                  2.23.4
pydub                          0.25.1
pydyf                          0.11.0
pygame                         2.1.2
pyglet                         2.1.3
pyglm                          2.8.0
Pygments                       2.11.2
pyHanko                        0.25.3
pyhanko-certvalidator          0.26.5
pyinstaller                    5.10.1
pyinstaller-hooks-contrib      2022.2
PyJWT                          2.8.0
pymongo                        4.0.1
PyMySQL                        1.1.1
pynvml                         11.5.0
PyOpenGL                       3.1.6
PyOpenGL-accelerate            3.1.6
pyOpenSSL                      23.3.0
pypandoc                       1.13
pyparsing                      2.4.7
pypdf                          5.1.0
pyperclip                      1.9.0
pyphen                         0.15.0
pypinyin                       0.49.0
pypiwin32                      223
pypng                          0.20220715.0
pyproj                         3.5.0
PyQt5                          5.15.6
PyQt5-Qt5                      5.15.2
PyQt5-sip                      12.9.1
pyquaternion                   0.9.9
pyrr                           0.10.3
pyrsistent                     0.18.0
pyserial                       3.5
PySide6                        6.3.2
PySide6-Addons                 6.3.2
PySide6-Essentials             6.3.2
PySocks                        1.7.1
pytest                         3.10.1
pytest-cov                     2.6.1
python-bidi                    0.6.3
python-dateutil                2.8.2
python-dotenv                  0.21.1
python-Levenshtein             0.12.2
python-slugify                 8.0.4
PythonWebHDFS                  0.2.3
pytools                        2021.2.8
pytorch-crf                    0.7.2
pyttsx3                        2.98
pytz                           2021.3
PyWavelets                     1.1.1
pywin32                        303
pywin32-ctypes                 0.2.0
pywinpty                       1.1.6
PyYAML                         6.0
pyzmq                          26.4.0
qrcode                         7.4.2
qtconsole                      5.2.2
QtPy                           2.0.0
rdkit-pypi                     2022.3.5
referencing                    0.36.2
regex                          2022.1.18
reportlab                      4.2.5
requests                       2.32.3
requests-oauthlib              1.3.0
resnet                         0.1
responses                      0.17.0
rich                           12.4.4
rpds-py                        0.24.0
rsa                            4.7.2
ruamel.yaml                    0.17.21
ruamel.yaml.clib               0.2.6
sacremoses                     0.0.53
schema                         0.7.5
scikit-image                   0.18.3
scikit-learn                   1.0.1
scipy                          1.13.1
screeninfo                     0.8.1
seaborn                        0.11.2
selenium                       3.14.0
Send2Trash                     1.8.0
sentencepiece                  0.1.97
sentry-sdk                     1.4.3
setuptools                     64.0.0
Shapely                        1.8.0
shiboken6                      6.3.2
shortuuid                      1.0.1
si-prefix                      1.2.2
simplejson                     3.17.6
simutils                       0.0.2
six                            1.15.0
skia-pathops                   0.7.4
sklearn                        0.0
smart-open                     6.1.0
smmap                          5.0.0
sniffio                        1.2.0
snowballstemmer                2.2.0
snownlp                        0.12.3
sortedcontainers               2.4.0
soundfile                      0.12.1
soupsieve                      2.3.1
sox                            1.5.0
spacy                          2.3.8
SpeechRecognition              3.14.2
Sphinx                         5.1.1
sphinxcontrib-applehelp        1.0.2
sphinxcontrib-devhelp          1.0.2
sphinxcontrib-htmlhelp         2.0.0
sphinxcontrib-jsmath           1.0.1
sphinxcontrib-qthelp           1.0.3
sphinxcontrib-serializinghtml  1.1.5
SQLAlchemy                     1.4.39
sqlparse                       0.4.3
srsly                          1.0.6
srt                            3.5.3
stack-data                     0.2.0
statsmodels                    0.13.2
subprocess32                   3.5.4
svgelements                    1.9.6
svglib                         1.5.1
sympy                          1.9
tabulate                       0.8.9
tenacity                       8.0.1
tensorboard                    2.7.0
tensorboard-data-server        0.6.1
tensorboard-plugin-wit         1.8.0
tensorboardX                   2.4.1
tensorflow                     2.6.0
tensorflow-estimator           2.7.0
tensorflow-io-gcs-filesystem   0.23.1
tensorrt                       8.4.1.5
termcolor                      1.1.0
terminado                      0.12.1
terminaltables                 3.1.10
testpath                       0.5.0
text-unidecode                 1.3
tf-estimator-nightly           2.8.0.dev2021122109
Theano                         1.0.5
thinc                          7.4.6
thop                           0.0.31.post2005241907
threadpoolctl                  3.0.0
tifffile                       2021.10.12
tiktoken                       0.9.0
tinycss2                       1.4.0
tinyhtml5                      2.0.0
tokenizers                     0.11.6
toml                           0.10.2
tomli                          2.2.1
toolz                          0.12.0
toposort                       1.5
torch                          1.10.0+cu113
torchaudio                     0.10.0+cu113
torchsummary                   1.5.1
torchtext                      0.11.2
torchvision                    0.11.1+cu113
tornado                        6.1
tqdm                           4.64.0
traitlets                      5.1.1
transformers                   4.16.0
trio                           0.19.0
trio-websocket                 0.9.2
typeguard                      2.13.3
typer                          0.6.1
typing_extensions              4.13.0
typish                         1.9.3
tzdata                         2022.6
tzlocal                        5.2
uncurl                         0.0.11
Unidecode                      1.3.6
uritools                       4.0.3
urllib3                        1.26.7
vega                           3.6.0
vega-datasets                  0.9.0
waitress                       2.1.2
wandb                          0.12.7
wasabi                         0.10.1
watchdog                       3.0.0
wcwidth                        0.2.5
weasyprint                     63.0
webdriver-manager              4.0.1
webencodings                   0.5.1
websockets                     10.1
wechatpayv3                    1.2.43
Werkzeug                       2.0.2
wheel                          0.37.0
whichcraft                     0.6.1
widgetsnbextension             3.5.2
win32-setctime                 1.0.4
wordcloud                      1.9.2
wrapt                          1.12.1
wsproto                        1.0.0
xhtml2pdf                      0.2.16
xlrd                           2.0.1
yarg                           0.1.9
yarl                           1.9.4
yaspin                         2.1.0
yolo5                          0.0.1
yolov5                         6.0.4
zhipuai                        2.1.5.20250410
zipp                           3.21.0
zope.event                     4.6
zope.interface                 6.0
zopfli                         0.2.3.post1

LaTeX details

• LaTeX distribution:
• Installed LaTeX packages:
  

Additional comments

[uwezi]

I cannot reproduce the additional lines and otherwise strange rendering of the Chinese text on my system - are you using the opengl renderer?

When it comes to the display of the Nabla operator - this is already caused by LaTeX itself and thus not an issue which Manim could resolve. This is the result of the rendering of the LaTeX file separately using MikTeX's xelatex:

Actually the display of Nabla for \div appears to be as intended by LaTeX when the physics package is included, which is the case for the predefined ctex collection in Manim.

Use \divsymbol instead

config.tex_template = TexTemplateLibrary.ctex
config["background_color"] = BLACK

class FourBasicOperations(Scene):
    def construct(self):
        # 标题
        title = Text("你好，今天我们使用manim来展示四则运算", font_size=48, color=WHITE)
        self.play(Write(title))
        self.wait(1)
        self.play(FadeOut(title))

        add_exp = MathTex("2 + 3 = 5", color=GREEN)
        sub_exp = MathTex("5 - 2 = 3", color=BLUE)
        mul_exp = MathTex(r"3 \times 4 = 12", color=RED)
        div_exp = MathTex(r"12 \divisionsymbol 3 = 4", color=PURPLE)

        expressions = VGroup(add_exp, sub_exp, mul_exp, div_exp).arrange_in_grid(
            rows=2, cols=2, buff=1.0
        )

        # 逐个显示运算
        self.play(Write(add_exp))
        self.wait(0.5)
        self.play(Write(sub_exp))
        self.wait(0.5)
        self.play(Write(mul_exp))
        self.wait(0.5)
        self.play(Write(div_exp))
        self.wait(2)

FourBasicOperations.mp4

[uwezi]

System specifications

System Details

* Python version:python3.9

* Installed modules :

manim 0.18.0

Update to the current version Manim 0.19.0 and see if the rendering of the Chinese characters improves.

[sqz-07040120]

Thank you for your reply. Here is my test.
https://github.com/user-attachments/assets/2d76fe64-50d8-4b02-987e-d4a1f756b9dd
This is the rendered video effect after upgrading to manim1.9, the Chinese part is not better.
https://github.com/user-attachments/assets/c5c14037-7041-44b4-a639-aa65d40d2526
I used this command to render with opengl, and it doesn't seem to change much.

manim -pql question_video.py FourBasicOperations --disable_caching --renderer=opengl

I also tried changing the font pack, but it didn't work either.

[sqz-07040120]

https://github.com/user-attachments/assets/b73b6c95-9643-45a9-8d83-8839826c0952
Sorry, I just uncorrectly upgraded my manim. Now I have correctly upgraded to manim 1.9 and tried the Chinese character effect. Now it can be displayed correctly. Thanks for your help.