Dear Dr. Liwang Ma, I am Ngo Ngoc Hung, from Vietnam, I got my Ph.D in Soil Science from UPLB-IRRI (the International Rice Research Institute)under supervision of Dr. Upendra Singh. One part of my Thesis have been applied CERES- Rice model in DDSAT. Presently I work in Cantho University, South Vietnam. I have offered the subject of "Applying Modelling in agricultural system" as a course work for our Bachelor student. I have interested Modelling for many year and tried to found any opportunity for to take the support for my research on applying system models for agricultural management. Therefore, could you please send to me any helpful information for postdoctoral candidate of the project. Sincerely yours Ngo Ngoc Hung, Ph.D Soil Science and Land Management Department College of Agriculture Cantho University Vietnam.