As one of the main personnel, he participated in the first test-tube baby and gift baby in Chinese mainland, frozen-thawed embryo test-tube baby, etc. About 3000 cases have personally participated in in in vitro fertilization and embryo transfer treatment. They are the main personnel who assist pregnancy through intracytoplasmic sperm injection (ICSI), preimplantation embryo gene diagnosis (PGD) and various derivative techniques, and master and are familiar with the latest technologies related to assisted reproduction. 1. Establish a human reproductive reserve center; Project leader of key projects of Peking University Third Hospital in 2009; 2. Study on the Regulation Mechanism of Spermatogenesis of Roche Translocation Carrier: Director of General Project of National Natural Science Foundation of China 20 1 1.