In China, if you want to get the business from other people, or you want to have a good relationship with your boss. You may need to drink much alcoholic drinks to show your sincerity, and it also means you are respecting people who have dinner with you.
It lead impropriety culture that people can't drink much alcoholic drink who is discourteous people in dinner. There are many news about people died because he drink a lot of alcohol in the dinner.
This is horrible and impropriety alcoholic culture