Jin Yindi, a resident of Nanxiawen village in Taiyuan city, programs her gas-fired boiler at home (upper picture), and shows the warehouse where coal used to be stored (bottom picture), Oct 18. Taiyuan, one of regions dependent on coal mining, will bid farewell to burning coal this winter as the city has been making a gradual switch from coal to gas since 2012. Nanxiawen village is the first village in Taiyuan to switch from coal to gas. [Photo/Xinhua]