China will encourage business model innovations and offer favorable policies to expand the charging network across the nation, according to a document issued on Monday by the National Development and Reform Commission and related departments.

Key undertakings identified in the action plan include enhancing charging technologies and operational efficiency, optimizing facility layout, and improving the industry's standard system.

Industry experts said charging infrastructure is one of the indispensable foundations for new energy vehicles. Having adopted various incentives, China has more than 600,000 charging piles so far.

State Grid Corp of China is building a public charging network covering Beijing, Tianjin, Hebei province, Shandong province, and all cities in the Yangtze River Delta region, according to Que Shifeng, deputy general manager of State Grid Electric Vehicle Service Co, a wholly owned subsidiary of State Grid.

Between January and October, China's new energy vehicle sales increased 75.6 percent year-on-year to 860,000 units, according to the China Association of Automobile Manufacturers.

The generally positive growth outlook for the industry has triggered a scramble among foreign players to invest in the manufacturing of lithium-ion battery cells, a common type of rechargeable battery.

The report said that the South Korean manufacturer would invest in the construction of five production lines. The firm completed the first phase of its battery production unit in the city in 2015.

SK Innovation from South Korea announced in August that it had selected Changzhou in Jiangsu province as the site of an electric vehicle battery cell factory, which will be capable of producing batteries with a total capacity of 7.5 gigawatt-hours annually.