Changan District, Jinan City, in 2018, increased central heating, 300,000 square meters of natural gas, 9,000 homes
Changan District, Jinan City, ໃນປີ 2018, ເພີ່ມຂຶ້ນຄວາມຮ້ອນສູນກາງ, 300,000 ແມັດມົນທົນຂອງອາຍແກັສທໍາມະຊາດ, 9,000 ບ້ານ