Photo taken on Nov. 30, 2018 shows a charging device and a new energy vehicle at the headquarters of China's new energy vehicle maker BYD in Shenzhen, south China's Guangdong Province. (Xinhua/Mao Siqian)

China will boost new-energy vehicle (NEV) sector in next 15 years, raising proportion of NEV sales to 20% of total new auto sales by 2025, making NEV mainstream by 2035, with all public sector vehicles to be NEV, according to a development plan Monday.