Photo taken July 27, 2006 shows the renovated Tangshan Anti-Earthquake Museum. (Xinhua Photo)

Photo taken July 27, 2006 shows the hall of renovated Tangshan Anti-Earthquake Museum. (Xinhua Photo)

Chang Qing, a 71-year-old photographer, puts the photos in order at home in Tangshan City of north China's Hebei Province on July 25, 2006. Chang, with over 40 years of photography career, has been recording Tangshan with his camera since 1970's. In 1976, he pictured the aftermath of Tangshan earthquake and the reconstruction of the city. During the past 30 years, Chang has taken over 10,000 photos featuring the great changes of Tangshan. (Xinhua Photo)

Chang Qing, a 71-year-old photographer, takes photos in front of a monument marking the 1976 earthquake in Tangshan City of north China's Hebei Province on July 25, 2006. (Xinhua Photo)

Chang Qing, a 71-year-old photographer, shows two photos of Tangshan at home in Tangshan City of north China's Hebei Province on July 25, 2006. (Xinhua Photo)

Chang Qing, a 71-year-old photographer, shows a photo of the ruins he took in 1976 Tangshan earthquake in front of the protected ruins at Hebei Polytechnic University in Tangshan City of north China's Hebei Province on July 25, 2006. (Xinhua Photo)

Chang Qing (R), a 71-year-old photographer, shows a photo he took before 1976 Tangshan earthquake to his friend Zhao Xifa at home in Tangshan City of north China's Hebei Province on July 25, 2006. (Xinhua Photo)

Editor: Yan