What does critical health mean?
Critical health is a health code. Henan "health code" is called "Henan You Mei health code". This technology was independently developed by Professor Xu Mingliang from Henan Technical Engineering Research Center of Zhengzhou University. It uses the QR code of Meiyou as offline publicity materials to enhance the security and reliability of the system. With the characteristics of "security+controllability+universality+beauty+intelligence", it is the world's leading two-dimensional code technology system and the service platform of the Internet of Everything.