HONG KONG (AFX-ASIA) – PetroChina Co Ltd said it has appointed Ma Fucai as chairman and Wu Yaowen and Ren Chuanjun as vice-chairman following a board meeting. It said Chen Geng has been made president while Su Shulin has been appointed senior vice-president. Wang Fucheng, Liu Baohe and Duan Wende have been named vice-presidents…