The five top power groups as well as China Resource Power Holding Co., Ltd untied to present a petition to National Development and Reform Commission to plea the top economic planner to set the long contract price for this year.

As coal supply constrained in some regions of China become more and more obviously, some coal supplier had stopped to transport coal to power plants, as an effort to raise the coal price.

However, with the poor stock in the warehouses, some power plants will be forced to limit or even stop generating electricity.

Therefore, the five power tycoons, Guodian, Huadian, Huaneng, Datang, China Power Investment and China Resource Power allied to ask NDRC to involve the negotiations between the two sides and set compulsory power coal price that to be fixed higher 4 percent from the previous year.

NDRC, however, still has not response, and may not going to be nailed down to a definite reply as the stock on Qinhuangdao port is building up recently and market will not appear obviously tight supply over a wide range, said analysts.