Aerial photo taken on Aug. 14, 2019 shows a ship berthing at a wharf of Caofeidian port area in Tangshan, north China's Hebei Province. The throughput of Caofeidian port area reached 196.56 million tons from January to July this year with a year-on-year growth of 6.93 percent. (Xinhua/Yang Shiyao)

Aerial photo taken on Aug. 14, 2019 shows a ship berthing at a wharf of Caofeidian port area in Tangshan, north China's Hebei Province. The throughput of Caofeidian port area reached 196.56 million tons from January to July this year with a year-on-year growth of 6.93 percent. (Xinhua/Yang Shiyao)

A ship is seen at a wharf of Caofeidian port area in Tangshan, north China's Hebei Province, on Aug. 14, 2019. The throughput of Caofeidian port area reached 196.56 million tons from January to July this year with a year-on-year growth of 6.93 percent. (Xinhua/Yang Shiyao)

Aerial photo taken on Aug. 14, 2019 shows a ship at a wharf of Caofeidian port area in Tangshan, north China's Hebei Province. The throughput of Caofeidian port area reached 196.56 million tons from January to July this year with a year-on-year growth of 6.93 percent. (Xinhua/Yang Shiyao)