Just let you know that people in Shenzhen are from too many places, some of them are nice, some of them just........So there will be a culture gap among these people, And for you, the wall is even higher, but it doesn't u cant break it. Its too hard to tell you what to do since most Chinese gays are too "shy" to be actively approach other guys. And when you think they don't look at you, that's what you think, but they are actually. in a undetectable way, ninja style if i may say. Even they are so horny that could just fk any guy in a bar, they usually don't show how they feels, I grew up in Zhuhai city,some province. So trust me, you are being noticed. Im attending a collage in the US right now and have experienced the huge difference. I am psychology, behavior science major, Your situation kinda interested me, i would love to go to a gaybar and see how it goes. i never been to one before i left china, i was like 17. But this November i am heading home. btw, if you got a chance visiting Zhuhai, do let me know.
i just got a simple answer, most of the time people think you speak a foreign language, so they don't think they can talk to you, Stay back and chill is kinda what chinese do when they don't feel a big possibility to achieve something.