The reason is that there is no login, no real name and no online.
Click on the health code and a "warm reminder" will appear. The health code will not be displayed directly. In this case, directly open the mobile phone network and click the health code again to see it. With the outbreak of the epidemic in COVID-19, the epidemic prevention and health code has become a proof that must be prepared every day. When we go to or pass by some public places, we must show the epidemic prevention and health code.