A Porsche Panamera 4 e-hybrid car is seen on the first public day of the 87th Geneva International Motor Show in Geneva, Switzerland, March 9, 2017. (Xinhua/Xu Jinquan)
A Porsche Panamera 4 e-hybrid car is seen on the first public day of the 87th Geneva International Motor Show in Geneva, Switzerland, March 9, 2017. (Xinhua/Xu Jinquan)