Guangzhou doesn't even check nucleic acids. Why do you check elsewhere?

The policy is different. Guangzhou does not check nucleic acid, but other places check nucleic acid because of different policies. Every place has its own policies, so it's different. Guangzhou, referred to as Yangcheng and Huacheng for short, is a prefecture-level city under the jurisdiction of Guangdong Province, the capital of Guangdong Province, a sub-provincial city, a national central city, a megacity and a core city of Guangzhou metropolitan area. The State Council approved China as an important central city, international business center and comprehensive transportation hub.