China's environmental protection sector reported steady revenue growth in 2021 as the country has ramped up green growth efforts.

The LCRC said that since the railway's opening, it has been actively enhancing the transportation organization, optimizing the freight service, and effectively ensuring efficient and smooth transportation.

The trip by rail and sea was about 20 days shorter than if the goods had been sent by sea.

The industry has also stepped up efforts ensuring safe mining in recent years, Sun said.

The foreign trade value of North China's Hebei province reached 313.46 billion yuan ($46 billion) in the first seven months of this year.

A total of 16 out of 41 major industries saw growth in profits in the January-July period, and 14 of them reported growth of over 5 percent.

The upgrades, targeted to promote clean production and improve efficiency, have brought about both environmental and economic benefits.

State-owned China Energy Investment Corp is ramping up efforts to dispatch coal from production hubs such as Shaanxi and Gansu provinces to Sichuan province and Chongqing.