Its a collectivist society. They don't actually think/know/believe these myths, but have been taught to parrot them. Virtually all Chinese students abroad will, given the chance, tell their audience "my hometown is very beautiful", when you well know its a toxic dump. It does have the cleanest hookers after Taiyuan, but they fail to mention that. Oh, and Chinese food is very delicious. Well, it can be, but is often luke warm artery clogging congealed pig fat. And the rice is cold and has set into a brick like formation.The waitress picks her nose and the cook never washes his hands after visiting the toilet which he has to do many times each day as he has gastro. Etc.
Another habit they and their Riben neighbours bring is sniffing. Sucking nose water back, usually in a silent situation like an exam, because using a tissue is a filthy Western habit.