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.

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.

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

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

Profits at China's industrial companies fell in the first seven months of this year as the country grapples with pandemic-related disruptions, high temperatures and insufficient domestic demand.

As the world's largest stainless steel producer and consumer, China saw its output rise 1.64 percent year-on-year to over 30.6 million tons in 2021.

China's booming environmental protection industry is playing an increasingly important role in boosting economic growth.