In 2002, there were no billionaires in China. In 2007, there were 106 billionaires.
In 1911, pigtails were banned in China because they were seen as a link with its feudal past.
In Hong Kong, a betrayed wife is legally allowed to kill her adulterous husband, but may only do so with her bare hands. (The husband's lover, on the other hand, may be killed in any manner desired.)