Huaneng Zhongtian Energy Conservation Technology Group Co., Ltd. ndi malo opangira ubweya wa miyala ndi mphira kumpoto kwa China.Yakhazikitsidwa mu 1985, yakhala ikufufuza zida zopulumutsira mphamvu ndi kutchinjiriza kwa nyumba kwa zaka 35.Gululi limatenga malo okwana maekala 420, limalemba ntchito anthu opitilira chikwi, ndipo lidachita nawo ntchito yokonza ndikuwongolera miyezo yadziko kangapo, ndikulandira ziphaso zovomerezeka pafupifupi zana.