CHINA is extending its lead in the development of new-energy vehicles this year, mainly driven by rapid market growth and increasing battery production capability, according to a report published by German consulting firm Roland Berger. In terms of the sales target of electric vehicles, China sets a target of having electric vehicles account for 15 percent to 20 percent of the total car sales in 2025 and 40 percent to 50 percent of those sold in 2030, Roland Berger said in it