SHIJIAZHUANG, May 8 (Xinhua) -- China's benchmark power coal price remained flat during the past week.

The Bohai-Rim Steam-Coal Price Index (BSPI), a gauge of coal prices in northern China's major ports, stood at 579 yuan (about 86 U.S. dollars) per tonne Wednesday, according to Qinhuangdao Ocean Shipping Coal Trading Market Co. Ltd. Enditem