An analyst said green hydrogen will play an important role in interconnecting renewable energy and decarbonization within industrial systems.

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

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.

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

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.

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

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

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.