Volkswagen (VOWG_p.DE) on Wednesday said it signed a cooperation agreement with SAIC Motor Corporation to boost production, research and development of electric cars in China. VW said it has agreed to expand the main plant of the Chinese joint venture SVW in Anting. Over the next four years, Volkswagen plans to localize more than 15 different electric vehicle models in China, including plug-in hybrids and fully electric vehicles, the company said.