Aerial photo taken on April 26, 2021 shows the Kailuan coal mine in Tangshan City, north China's Hebei Province. Tangshan City in north China's Hebei Province, leaning against the Yanshan Mountains, facing the Bohai Sea, and abutting Beijing and Tianjin, is the cradle of China's modern industry, a recovery miracle after the horrific earthquake in 1976 and also the hometown of Li Dazhao, a co-founder of the Communist Party of China (CPC). (Xinhua/Jin Haoyuan)

Aerial photo taken on April 26, 2021 shows the memorial hall of Li Dazhao, a co-founder of the Communist Party of China (CPC), in Laoting County of Tangshan City, north China's Hebei Province. Tangshan City in north China's Hebei Province, leaning against the Yanshan Mountains, facing the Bohai Sea, and abutting Beijing and Tianjin, is the cradle of China's modern industry, a recovery miracle after the horrific earthquake in 1976 and also the hometown of Li Dazhao. (Xinhua/Jin Haoyuan)

Aerial photo taken on April 26, 2021 shows the former residence of Li Dazhao, a co-founder of the Communist Party of China (CPC), in Daheituo Village, Laoting County of Tangshan City, north China's Hebei Province. Tangshan City in north China's Hebei Province, leaning against the Yanshan Mountains, facing the Bohai Sea, and abutting Beijing and Tianjin, is the cradle of China's modern industry, a recovery miracle after the horrific earthquake in 1976 and also the hometown of Li Dazhao. (Xinhua/Xing Guangli)

Aerial photo taken on April 26, 2021 shows the Kailuan coal mine in Tangshan City, north China's Hebei Province. Tangshan City in north China's Hebei Province, leaning against the Yanshan Mountains, facing the Bohai Sea, and abutting Beijing and Tianjin, is the cradle of China's modern industry, a recovery miracle after the horrific earthquake in 1976 and also the hometown of Li Dazhao, a co-founder of the Communist Party of China (CPC). (Xinhua/Xing Guangli)

Aerial photo taken on April 26, 2021 shows the memorial hall of Li Dazhao, a co-founder of the Communist Party of China (CPC), in Laoting County of Tangshan City, north China's Hebei Province. Tangshan City in north China's Hebei Province, leaning against the Yanshan Mountains, facing the Bohai Sea, and abutting Beijing and Tianjin, is the cradle of China's modern industry, a recovery miracle after the horrific earthquake in 1976 and also the hometown of Li Dazhao. (Xinhua/Xing Guangli)

Aerial photo taken on April 27, 2021 shows the Nanhu lake park in Tangshan City, north China's Hebei Province. Tangshan City in north China's Hebei Province, leaning against the Yanshan Mountains, facing the Bohai Sea, and abutting Beijing and Tianjin, is the cradle of China's modern industry, a recovery miracle after the horrific earthquake in 1976 and also the hometown of Li Dazhao, a co-founder of the Communist Party of China (CPC). (Xinhua/Jin Haoyuan)

Aerial photo taken on April 27, 2021 shows the Huifeng lake park in Tangshan City, north China's Hebei Province. Tangshan City in north China's Hebei Province, leaning against the Yanshan Mountains, facing the Bohai Sea, and abutting Beijing and Tianjin, is the cradle of China's modern industry, a recovery miracle after the horrific earthquake in 1976 and also the hometown of Li Dazhao, a co-founder of the Communist Party of China (CPC). (Xinhua/Jin Haoyuan)

Aerial photo taken on April 25, 2021 shows the city view in Tangshan City, north China's Hebei Province. Tangshan City in north China's Hebei Province, leaning against the Yanshan Mountains, facing the Bohai Sea, and abutting Beijing and Tianjin, is the cradle of China's modern industry, a recovery miracle after the horrific earthquake in 1976 and also the hometown of Li Dazhao, a co-founder of the Communist Party of China (CPC). (Xinhua/Yang Shiyao)