A visitor tries out an electric car charging machine in the State Grid booth at the Clean Energy Expo China & Wind Power Asia Conference which opened on Wednesday in Beijing. The 3-day expo attracted more than 400 companies from 22 countries. It displayed cutting-edge technologies in the clean energy field and offered a trade platform for exhibitors. [CnDG by Jiao Meng] 

An exhibitor from Denmark discusses business with a customer at the Clean Energy Expo China & Wind Power Asia Conference which opened on Wednesday in Beijing. The 3-day expo attracted more than 400 companies from 22 countries. It displayed cutting-edge technologies in the clean energy field and offered a trade platform for exhibitors. [CnDG by Jiao Meng]