Any updated experience to share for those who have traveled from the US to HK and got the test before travel?

I'm concerned if I'm coming from a small city there won't be an appropriate lab that can provide the test for me up to HK government's standards. I wonder if I should plan my trip so that I spend a couple of days in SF before flying back to HK, where I know I can "easily" arrange to get the right test (and have friends there who have done it).