China National Offshore Oil Corp (CNOOC) is considering to build battery-charging stations for electric vehicles as part of a push by the oil company to support alternative energy, the Wall Street Journal reported. CNOOC in July invested US$732 million in Tianjin Lishen Battery Joint-Stock, a Chinese company that makes lithium batteries for electric vehicles. Lishen said it would use the investment to build 20 battery assembly lines. The Chinese oil company’s decision comes as Chinese oil companies make moves into investments into alternative energy, encouraged by a government mandate to reduce greenhouse gas emissions and dependence on foreign oil. CNOOC is also building an offshore wind farm. China National Petroleum Corp is a partner in a carbon exchange market in Tianjin and Sinopec is involved in making cleaner-burning gasoline out of coal.