What is the heating fee standard in Xi 'an?

I come from Xi 'an. This winter, Xi municipal government raised the benchmark price of central heating from 4.0 yuan/m2 to 4.8 yuan/m2 through "price hearing", and then raised it from residential property to 5.0~5.3 yuan/m2 predicted by end users.

If the price rises by 20%, each household will have to pay 500~600 yuan more in 2008.