Mass Murder in China

In my semi-daily perusal of Chinese news items, I came across this story about two cases of mass murder. The first involes a man who, for reasons unknown, stabbed ten members of his family to death before taking his own life. The second, a woman charged with killing seven people (including members of her own family) is notable for this bit of information:

Zhang fatally poisoned her two-year-old daughter in 1992 because her husband wanted a son, the paper quoted officials as saying. She had another baby girl in 1993 and killed her a year after, the [Shanghai Daily] said.

[My emphasis]