Photo taken on Aug. 15, 2018 shows the city view of Tangshan, north China's Hebei Province. In the early hours of July 28, 1976, a 7.8-magnitude earthquake struck the city in Hebei Province, killing over 242,000 people. (Xinhua/Dong Jun)

Photo taken on Aug. 15, 2018 shows the aerial view of the Earthquake Monument square in Tangshan, north China's Hebei Province. In the early hours of July 28, 1976, a 7.8-magnitude earthquake struck the city in Hebei Province, killing over 242,000 people. (Xinhua/Dong Jun)

Photo taken on Aug. 15, 2018 shows the Tangshan railway station in Tangshan, north China's Hebei Province. In the early hours of July 28, 1976, a 7.8-magnitude earthquake struck the city in Hebei Province, killing over 242,000 people. (Xinhua/Dong Jun)

Photo taken on Aug. 15, 2018 shows the aerial view of the Nanhu park in Tangshan, north China's Hebei Province. In the early hours of July 28, 1976, a 7.8-magnitude earthquake struck the city in Hebei Province, killing over 242,000 people. (Xinhua/Dong Jun)