Chinese Vice Premier Ma Kai (C rear), who is also a member of the Political Bureau of the Communist Party of China (CPC) Central Committee, speaks at a symposium on power battery in Tianjin, north China, Sept. 26, 2014. Ma had an inspection tour to companies researching and producing power battery in Tianjin from Sept. 25 to 26. (Xinhua/Yue Yuewei)