Hello JX,
Welcome to the Nexus. How wonderful to have a New Member from mainland China,

. Nexus enjoys members from at least six continents, and perhaps all seven.
Pup Tentacle is right. I would also strongly encourage you to read the Attitude section. It outlines the rules and culture here at Nexus, as well as what we focus on here. At the end of the Attitude you will see that we do not use Nexus as a way to arrange personal meetings. This is mainly due to the fact that we are dealing with Scheduled I/A materials. We want everyone to be safe.
wiki.dmt-nexus.me
The main focus here is plants, research and entheogenic extractions. But, this place is huge and diverse and just about everyone who joins and stays finds an area that really resonates with them. Hopefully that will be the case with you.
Again, welcome to the Nexus.