The Shanxi Coking Coal Group, which is listed on the Shanghai Stock Exchange, produces about five million tons a year of coking coal, Xinhua reported.
Beneath the land around the Port Talbot factory lies an estimated 380m tonnes of coking coal.
The coal is of high quality, and production is mostly anthracite; coking coal is also mined.
It now belongs to Yankuang Group, a coking company in Shandong Province.
Suppliers of coking coal, also vital to the steelmaking process, insisted on even greater hikes.
It sold coking coal to offshore steel producers and was New Zealand's second-biggest coal exporter.
Inside, coking, sintering and smelting plants churned out crude iron and steel.
The disruptions have driven coking coal spot prices up by about 15 percent, to as much as $290 a ton.
Queensland produces roughly one-third of the world's supply of coking coal, used in the production of steel.
The basin yields high-grade steaming and coking coals, which are transported by electric railways to specialized ports.
Each tonne of steel needs 1.7 tonnes of iron ore and more than half a tonne of coking coal.
