When was Zhengzhou Nucleic Acid House built?

mid-may. Since mid-May, convenience nucleic acid testing and sampling stations have been erected on the streets of Zhengzhou, which the citizens affectionately call "nucleic acid hut". Zhengzhou is called "Zheng" for short, and it is called "in the world" in history, and it is called Shangdu in ancient times, and now it is called Greentown. Henan Province governs prefecture-level cities, provincial capitals and megacities, and the Thirteenth Five-Year Plan for Promoting the Rise of Central China clearly supports the national central cities under construction.