Any black been to china?

what was your experience? i came here last year to study but i am leaving tommorrow cos i am not comfortable in this country. It all started last year when i went shopping and see a lot of chinese coming to me start pointing at me and some sere following me when i am ping in the streets, my heart jumped and from there i don't go outside much but i am just getting nervous everyday that i end up waking up confused and even when i chinese speak to me, my heart beat fast and start sweating. I was real trying to understand chinese but i just ended up staying alone everyday even though some wanna be friends with me. Now i sometimes get a chest pain plus a weak body en whenever i go to the hospital, they say nothing is wrong with me but my body is becoming weak and my eyes get pain whenever i am reading. I guess they undermine blacks cos even the international office stuffs some of them are rude to me en never greet me back when i say hi.