In China, you will probably do all of the above in WeChat rather than email. Whenever I need to conduct business with someone in China, it's always over WeChat rather than email.
One of the Chinese court systems actually sends notifications through their WeChat account. I believe there are even pilot programs where you can initiate court cases through WeChat as well.
As a non-Chinese, this seems... problematic to say the least. What if you don't have WeChat, or prefer not to use it? Are there standards-based alternatives offered? Off-line alternatives, maybe?
One of the Chinese court systems actually sends notifications through their WeChat account. I believe there are even pilot programs where you can initiate court cases through WeChat as well.