Firefighters visit residents and check for damage in Guye district, Tangshan, Hebei province, which was hit by a 5.1 magnitude earthquake on Sunday. (Photos: Xinhua)

Firefighters visit residents and check for damage in Guye district, Tangshan, Hebei province, which was hit by a 5.1 magnitude earthquake on Sunday.

A bird's-eye view of Guye district, Tangshan. The city is an industrial hub, playing a leading role in the production of coal, steel and chemicals.