Aerial photo taken on July 9, 2018 shows a cargo ship which is about to anchor at Jingtang port area of Tangshan Port, north China's Hebei Province. The throughput of Tangshan Port reached 303 million tons from January to June this year, growing 7.28 percent year on year. (Xinhua/Yang Shiyao)

Aerial photo taken on July 9, 2018 shows cargo ships at Jingtang port area of Tangshan Port, north China's Hebei Province. The throughput of Tangshan Port reached 303 million tons from January to June this year, growing 7.28 percent year on year. (Xinhua/Yang Shiyao)

Aerial photo taken on July 9, 2018 shows a cargo ship at Jingtang port area of Tangshan Port, north China's Hebei Province. The throughput of Tangshan Port reached 303 million tons from January to June this year, growing 7.28 percent year on year. (Xinhua/Yang Shiyao)

Containers are loaded onto trucks at Jingtang port area of Tangshan Port, north China's Hebei Province, July 8, 2018. The throughput of Tangshan Port reached 303 million tons from January to June this year, growing 7.28 percent year on year. (Xinhua/Yang Shiyao)