By far the biggest reason why Chinese tourists act the way they do is because most of them are not even one generation removed from the villages. Most have not gone to university, maybe not even high school. Westerners can look down their noses all they want but when their countries were 70% agrarian, most people were pretty uncouth too.
Culture changes. Once two generations of Chinese have lived in affluent urban settings, their manners will converge with those of other developed countries.
Culture changes. Once two generations of Chinese have lived in affluent urban settings, their manners will converge with those of other developed countries.