Aerial photo taken on July 2, 2020 shows the construction site of the intercity railway connecting Beijing, capital of China, and Tangshan in north China's Hebei Province. (Xinhua/Yang Shiyao)

Aerial photo taken on July 2, 2020 shows the construction site of the intercity railway connecting Beijing, capital of China, and Tangshan in north China's Hebei Province. (Xinhua/Yang Shiyao)

Aerial photo taken on July 2, 2020 shows the construction site of the intercity railway connecting Beijing, capital of China, and Tangshan in north China's Hebei Province. (Xinhua/Yang Shiyao)

Photo taken on July 2, 2020 shows the construction site of the intercity railway connecting Beijing, capital of China, and Tangshan in north China's Hebei Province. (Xinhua/Yang Shiyao)

Photo taken on July 2, 2020 shows the construction site of the intercity railway connecting Beijing, capital of China, and Tangshan in north China's Hebei Province. (Xinhua/Yang Shiyao)