On March 14, 2013, Dr. Cong Ronggang, a research fellow in Centre for Environmental and Climate Research (CEC), Lund University, Sweden, visits CEEP-BIT and gives a talk of “A dynamic stochastic portfolio model for optimizing crop acreage and soil natural capital under multiple risks”. Dr. Wang Ke takes the chair. Teachers and students of CEEP-BIT discuss about this talk hotly and enquire matters concerned studying abroad.