Will others do something harmful to me with my health certificate?

You also have this worry, so you'd better not marry them, in that case. It is also very troublesome. Everyone has a health certificate and a health code. Everyone is the only one who can't give it to others because he is your information. To sum up, all his information is displayed on it. Don't give it to others casually. In that case. It will bring you trouble, just as our ID card and bank card must not be lent to others casually. Some people with bad intentions will really take these things, and maybe people who do bad things will do the same.