Hello from BeiJing.
Always beware of AIDS! Use condoms (tho‘ it would still not be 100% accurate) or buy the SELF BLOOD TESTING TOOLS on professional websites before you have bareback sex! There are brands such as "Aiike","MedMira", "HV.8", "Accu News", "Core tests"...buy them and test yourself and your sex partner(s) before each bareback sex action.
BUT BEWARE: HIV also has 2 - 6 weeks of incubation period,during this time,***** testing can not be 100% sure. So even if you're not having sex with anyone,it's absolute best for you to test yourself often.
Don't put your life on it,don't turn sex into Russian Roulette,nothing is worth of your life!!!
(The self ***** testing tools are something looks like this)