"But now there is no more black dust and pungent smell. I am surprised with the lovely days here."

Update makes reining in number of days with bad conditions top priority.

The deals involve smart equipment, intelligent manufacturing projects, rolling mills, and blockchain cross-border platform, according to the country's top steel-maker.

The crude steel output from January to September hit 781.59 million tons, up 4.5 percent from a year ago.

On November 6, POSCO and Tata Steel sign an agreement for business and technical cooperation of Hyperloop, an eco-friendly transportation.

UK-Australian iron ore mining firm BHP has signed an agreement with Chinese steelmaker China Baowu to invest up to $35mn in jointly seeking technical solutions to reduce carbon emissions in steelmaking.

China's steel exports in October rose by 5.2pc from September to 4.04mn t as Chinese mills shifted supplies to overseas markets with falling domestic prices.

January-October imports rose by 73.9pc from a year earlier to 17.71mn.