What does Zhengzhou epidemic iron plate mean?

Mandatory risk control. Zhengzhou's epidemic prevention measures are a containment measure adopted by government departments to enforce risk control and prevent residents from going out at will. Zhengzhou, referred to as "Zheng", was called the commercial capital in ancient times. It is the capital of Henan Province, a megacity, the core city of the Central Plains urban agglomeration, and an important central city in central China approved by the State Council.