Liang
My buddy works for a company that has business interest in china ,he has been to china about 10 times along with japan korea and other countries around the world his job is to learn the customs, languages etc,
he read your post and can't believe you could even connect to this site,he also tells me you are already busted but you don't even know it yet!!!
And being native chinese your fucked
Thats what he told me and he is rarely wrong on matters of justice in foreign lands,its his job to know the rules
Sorry to say you risking way too much bro and it might be too late