Mr. Chen Shanmin                 02/2007-

Mr. Sun Chun Ye                     02/2003- 01/2007

Mr. Lin Shang Lin                     08/2000-12/2002

Mr. Jiang Qin Zheng                 12/1999-06/2000

Mr. An Qi Guang                      09/1997-11/1999

Mr. Wang Xiu Cai                     06 /1994-08/1997

Mr. Zhang Zhen Rui                 03/1991-06/1994

Mr. He Zhang Ming                   03/1986-03/1991

Mr. Wang Di San                     12/1981-02/1986

Mr. Wang Jing Rong                06/1977-09/1981

Mr. Miao Jiu Rui                       09/1971-06/1977

Mr. Yuan Xin Hu                      08/1966-09/1971