China has a history of quakes, and they have seen some serious ones:
1556 Shaanxi , estimated 850 000 dead, mainly because most of the population lived in Yaodongs (living quarters hollowed out of mountain sides)
1920 - 200 000 dead
1927 - 200 000 dead
1976 - 255 000 dead
lots of smaller quakes:
April 1985: Earthquake measuring 6.3 kills 22 in Yunnan.
August 1985: Xinjiang hit by earthquake that kills 67 people and injures more than 100. The tremor measures 7.4.
November 1988: Earthquake measuring 7.6 devastates remote areas in Yunnan, killing at least 730 people and destroying about 400,000 homes.
October 1989: Series of tremors in northern Shanxi and Hebei provinces kill 29 people and leave 60,000 homeless.
April 1990: Earthquake measuring 6.9 kills 126 people in northwestern Qinghai province.
October 1995: Earthquake in Yunnan kills 50 and injures more than 6,000. The 6.5 tremor leaves 170,000 people homeless.
February 1996: Earthquake measuring 7.0 wrecks scenic mountain town of Lijiang in Yunnan, killing at least 304 people and injuring more than 16,000.
March 1996: Earthquake measuring 6.9 jolts Xinjiang, killing 26 people, injuring 128.
May 1996: Earthquake measuring 6.4 rocks Inner Mongolia, killing 15 people and injuring more than 200. Nearly 400 aftershocks follow.
January 1997: An earthquake measuring 6.4 kills up to 50 people and injures more than 40 in Xinjiang.
April 1997: A strong earthquake measuring 6.6 strikes Xinjiang, killing nine people and injuring 60.
January 1998: At least 47 people are killed and more than 2,000 injured when an earthquake measuring 6.2 rocks Hebei, devastating mud and brick homes in two rural counties.
February 24, 2003: At least 94 people are killed and more than 200 injured when a quake measuring 6.8 hits sparsely populated Jiashi county in Xinjiang.
http://www.cnn.com/2003/WORLD/asiapcf/east/02/24/china.quake.timeline.reut/