Mr. Wang's home in Qingyuan District, Baoding City, 80 square meters. The operating cost of the northern electromagnetic heating furnace in one winter (four months) is only about 1600 yuan, which is equivalent to more than 400 yuan a month.

Residents in North China need almost 2.5 tons of coal in winter. The price of high-quality coal is around 800 yuan, and heating in winter is about 2,000 yuan.