An executive of the company said such a practice has multiple benefits in both economic and environmental terms.

Hydrogen can only be generated by consuming primary energy such as coal, natural gas and renewable energy.

Steel, magnesium and its products, and coal are among the major exported commodities.

But to cut pollution, China has reduced steel production, leading to the closure of many plants.

In terms of improvement in rankings, China's Ansteel Group Corp made the highest jump across 183 places to 217.

They also said the industry will likely experience demand recovery to a certain extent in the coming months.

Steel, magnesium and its products, and coal are among the major exported commodities.

China reduced as much air pollution in seven years as the United States did in three decades.