Tu Jianjun, born in 1973. He received his Ph.D. degree in Chengdu Institute of Mountain Hazards and Environment, Chinese Academy of Sciences in 2005. He also received his B.S. and M.S. degrees from Southwest China Normal University in 1996 and 1999 respectively. He is also an associate professor and master instructor of Southwest University. His research interests focus on the regional planning, land use planning and GIS application.To whom correspondence should be addressed, E-mail:tujianjun81 @yahoo.com.cn