You mean you want to go home to your country and get tested. That can wait coz we are talking China but you must get treated for other sexually transmitted diseases. Those cannot wait. I know China denies the fact that they have AIDS.
While you wait to test, make sure not to put yourself or others in danger. Use protection. When are you going home to your country?
I disagree with 1/2000 ratio. The fluids that carry Hiv in the body include semen and vaginal fluids. During sex, there is friction and little cuts and tears that we do not feel get created and the virus finds a way in. Unprotected sex is up there on the list of ways to get HIV/AIDS.
Make sure to get treated for other STDs. They wouldn't deport you for those I don't think.
When one has an STD, it easier to contract HIV.
All the best
Muthoni (Mson)