You stated “I don’t know much about this project really” & with all due respect I think herein lies the answer to your own question.
It’s well worth taking the time to read up & learn more about how the Tor network functions. This will provide you with the technical insight to consider how you might best be able to help Internet users in China, if that’s what you wish to do.
There’s already a lot of information available online, some more current than others. By increasing your knowledge of the mechanics of Tor, you can find a place for yourself within the Tor network ecosystem, where you can make a valid contribution & get that ‘feel good’ feeling of satisfaction
These links provide some examples, an overview, about how Chinese Tor users can successfully access the network,
With this in mind, if Tor users in China can access Tor then they can also access Tor Onion Services.
Tor Onion services can enable Chinese Tor users to communicate with each other, within China, using the current Tor network infrastructure, no additional infrastructure is required to enable Chinese Tor users to achieve this objective.
A Tor user in China might choose to set up their own Onion Server either in China or abroad or they might chose to use something like OnionShare.
OnionShare has a useful range of functions including anonymous chat, file sharing & creating a static website.
With this in mind & if it were your inclination you might ask yourself, “How can I possibly contribute to helping Tor users in China?”
A broad answer might be to setup a Tor server & a more specific answer might be to run a Snowflake browser add-on to visit a webpage like https://snowflake.torproject.org/ & use the embedded snowflake proxy on that website or on another similar website that also provides an embedded snowflake proxy &/or you could set up a standalone Snowflake proxy.
Taking the time to read the documents, taking the time to methodically configure the server, finding a starting point from where you have the knowledge & experience of using an operating system you’ve become familiar with & on which you could set up a server.
Having a good working knowledge of an operating system on which to host your server will lessen the challenge of achieving the objective of configuring a Tor server or any server for that matter.
With a fundamental, fluent understanding of how your chosen operating system works this will help to enable you to avoid tripping up along the way.
It’s all a process that begins when someone is willing & motivated to take the time to learn & use that knowledge to make something work. Happy trails