since my background focused on physics, mathematics, electronics, lasers and optics, i have taught myself some beginning biology and chemistry courses this year, discussed them with teacher sin the dept of biological science and technology at tsinghua university i would also like to take more basic courses in this field under your guidance to make up my deficiency. from college guides i learned with pleasure that you had strong faculty with a variety of background in physics, chemistry, mathematics and electrical engineering. it is often in the multi-disciplinary research that came the most exciting discovery. your group also provides outstanding opportunities for close interaction between graduate students and faculty. that is why i deem your program as my best choice. besides, i want to link modern biophysics with chinese medicine to get comprehensive understanding of life.