Changqing Oilfied exploration area mainly in a basin area of 37 million square kilometers. accumulates proven geological reserves of 541.88 million tons of oil and gas. In order to improve power supply stability, Changqing applies 12 sets of Kehua FR-UK series UPS (20-80kVA), 10 sets of 20kVA to ensure power supply for the communications room; two sets of 80kVA for control center.