Rooftop solar gear, biomass heating, pumped-storage hydroelectricity among tech on rise.

The first freight train was on its way to Poland, the Baltic News Service (BNS) reported on Monday.

As China's leading energy base, Shanxi Province is key to the country's energy supply and electricity transmission.

China produced some 4.45 billion tons of coal last year, up 8 percent year-on- year.

Increase of clean energy seen as key to achieving nation's carbon goals.

Average monthly output of coal produced by the company has been around 50 million tons during the past 15 months, he added.

The figure includes 30 million tons of crude oil and more than 5.5 billion cubic meters of natural gas, according to Daqing Oilfield.

A trade delegation, composed of over 30 representatives from foreign trade enterprises and government in northeast China's Jilin Province, has recently departed for Russia to expand business opportunities there.