about kissing in China

In Chinese traditional culture, there aren’t to kiss at public, and they couldn’t kiss anybody, because they thought that is serious things for everyone, though parents kiss their children, just they are below four years old, when the children grow up begin to learn things or understand things, if parents kiss their children very much, people will be laughing to them, maybe they think them were not very good person. So, the parents didn’t use to kiss display their loving. This is a time culture in China.