Mun fara aikin gida "coal zuwa gas" tun daga 2016, sadaukar da kai ga National bayyana makamashi amfani a gida shirin, kuma tsunduma a kuri'a na dukiya aikin a arewacin lardin kamar Hebei, Shangdong, Shanxi, Ningxia, Gansu da sauransu.
Lokacin aikawa: Satumba-03-2021