GAC President of Engineering Institute Huang Xiangdon, GAC Group Vice-Chairman Yuan Zhongrong, GAC Group Vice-President Zhang Qingson and General Manager Gac Motor Wu Song (L to R) pose with the Guangzhou Automobile Group (GAC) GS4 during its world debut at the first press preview day of the North American International Auto Show in Detroit, Michigan Jan 12, 2015. [File photo]