I am from Longnan, Gansu (a low-risk area), and I want to visit Erlangjian, Qinghai Lake in a few days. May I ask: Can travelers from other provinces in my situation only have a health code to pass? Or do I need to provide other proof? Need to provide nucleic acid testing? In addition, the vaccine has only been given one injection, and the second injection has not yet arrived. Does this situation not affect it? Thanks.