because  ,they  think  older men  can take care of her ,and  carry her mistakes and capricious.not all of people  get married to older men  just means he his more maney..it's very few.

In China, a lot of people think that women should get married to older men?  Why?

Because China is very traditional. If a man is older, chances are he has more money and can provide for a woman.  I'm not like that, I always date women who are older than me.