Install and configure Wine.
First, install Wine.
sudo apt install wine64
After installing, open winecfg.
winecfg
Ajust the dpi to a higher value. I'm using 192 for 4K display.

Download and configure fonts
Download and configure fonts. Run the following commands:
sudo apt install cabextract
sudo apt install winetricks
winetricks corefonts gdiplus riched20 riched30
Download and install WeChat
Download wechat.
wget https://dldir1.qq.com/weixin/Windows/WeChatSetup.exe
Start WeChat installer with Wine.
wine ./WeChatSetup.exe
Now finish the installer like you done in Windows before.
Edit the language settings.
Hopefully, you will see WeChat logo in your program list.

Edit that with:
vim ~/.local/share/applications/wine/Programs/WeChat/WeChat.desktop
And modify the Exec part.
Append the following to the beginning:
env LC_ALL="zh_CN.UTF8"
It finally looks like this:

Now start WeChat!

Issues
- WeChat is running in a Chinese environment. So when WeChat is starting other things like browser, the browser might be Chinese edition.
- WeChat may crash when opening miniprograms.

Other solutions - Kylin WeChat
https://www.ubuntukylin.com/applications/106-cn.html
This is also an available WeChat solution, and native Linux solution, not webview nor wine.

However, it lacks of a lot of features:
- Running in background.
- Auto sign in
- Mini program
- Sync chat history
- Voice call
- Moments
- Search chat
It's just able to do minimum features like chating.
wget http://archive.ubuntukylin.com/software/pool/partner/weixin_2.1.1_amd64.deb
sudo dpkg -i ./weixin_2.1.1_amd64.deb
Other solutions - Deepin Wine WeChat
https://github.com/zq1997/deepin-wine
THis is also an available WeChat solution, but also wine.
However, it lacks of a lot of features:
- Pick photo to sync.
- Auto sign in
- Mini program
- Run as background
It's simple to install:
wget -O- https://deepin-wine.i-m.dev/setup.sh | sh
sudo apt install com.qq.weixin.deepin

If you don't mind installing a nspawn sub-system into your computer, try this awesome project: https://github.com/loaden/nspawn-qq