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

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.

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

China is a large consumer of iron ore.

Compared with wet quenching, Mi said the new technique has economic and environmental benefits.

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

The scale of the industrial internet industry has exceeded 1 trillion yuan.