A woman holding a flower basket walks past memorial walls in Tangshan, north China's Hebei Province, July 28, 2020, the 44th anniversary of the 1976 Tangshan Earthquake. (Photo by Dong Jun/Xinhua)

People visit Tangshan Earthquake Ruins Memorial Park in Tangshan, north China's Hebei Province, July 28, 2020, the 44th anniversary of the 1976 Tangshan Earthquake. (Photo by Dong Jun/Xinhua)

A man holding a flower basket walks past a memorial wall in Tangshan, north China's Hebei Province, July 28, 2020, the 44th anniversary of the 1976 Tangshan Earthquake. (Photo by Dong Jun/Xinhua)

A woman holding flowers walks past memorial walls in Tangshan, north China's Hebei Province, July 28, 2020, the 44th anniversary of the 1976 Tangshan Earthquake. (Photo by Dong Jun/Xinhua)

People mourn for the deceased in the 1976 Tangshan Earthquake in front of a memorial wall in Tangshan, north China's Hebei Province, July 28, 2020, the 44th anniversary of the earthquake. (Photo by Dong Jun/Xinhua)

People mourn for the deceased in the 1976 Tangshan Earthquake in front of a memorial wall in Tangshan, north China's Hebei Province, July 28, 2020, the 44th anniversary of the earthquake. (Photo by Dong Jun/Xinhua)

People arrange a flower basket at Tangshan Earthquake Ruins Memorial Park in Tangshan, north China's Hebei Province, July 28, 2020, the 44th anniversary of the 1976 Tangshan Earthquake. (Photo by Dong Jun/Xinhua)

People mourn for the deceased in the 1976 Tangshan Earthquake in front of a memorial wall in Tangshan, north China's Hebei Province, July 28, 2020, the 44th anniversary of the earthquake. (Photo by Dong Jun/Xinhua)

People mourn for the deceased in the 1976 Tangshan Earthquake in front of a memorial wall in Tangshan, north China's Hebei Province, July 28, 2020, the 44th anniversary of the earthquake. (Photo by Dong Jun/Xinhua)