The construction of China's largest charging stations for electric vehicles (EVs) has been completed in Linyi city, Shandong province, east China, on June 23, and the locally produced Yixing electric bus has now been put into service in the city, media reported today. As the seventh electric-vehicle charging station built by the State Grid Corporation of China (SGCC) in China, the Linyi charging facility includes two 1600 kVA transformers, 30 charging machines, 30 DC charging piles and 15 AC charging piles, which can serve 45 vehicles simultaneously with a combined charge capacity of 3200 kVA. According to SGCC, 75 electric vehicle-charging stations will be built in 27 cities across China by the end of this year and at present, two charging stations in Shenzhen city, built by China Southern Power Grid Company, are already in use.In addition, PetroChina Company Limited Comm (PTR) and China National Offshore Oil Corporation (CNOOC) also aim at developing electric vehicle charging station business. CNOOC is planning to create a joint venture to build electric-vehicle charging stations in over two provincial capital cities. However, an industry insider said it is good to promote the development of new energy vehicles, by adding more and more charging stations in the country, but an industry standard must be set up as soon as possible.