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

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.

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

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

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.

China's northernmost province of Heilongjiang saw its foreign trade in goods grow 31.9 percent year-on-year to 145.06 billion yuan ($21.52 billion) in the first seven months of 2022, according to local customs.

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