i guess most people politeness was taught to them by their parents,but i wanna say,the basic politeness i was taught by my parents,but some politeness was leslie cheuang taught,he was a huge star in china.but he's always be humble to people.he made me that we not just need to polite to people we meet,it's not flattering,it's not making people feel that yiu are good-mannered,we need to make people feel comfortable,no mater what jobs of them,no mater what social classes of them.so i guess leslie is a good teacher for me in this respect.