At 3:42 a.m. on July 28, 1976, a magnitude 7.8 earthquake hit the sleeping city of Tangshan, in northeastern China. The very large earthquake, striking an area where it was totally unexpected, obliterated the city of Tangshan and killed over 240,000 people - making it the deadliest earthquake of the twentieth century.
The author has ever joined in the saving action and experienced the whole disaster. After that he has been to many places and try to tell the world how to balance the development of human beings and nature.