Dasheng bian (Compiled Texts on Successful Birth), a famous book of TCM obstetrics compiled by JI Zhai-a lay Buddhist in the Qing dynasty, had a great influence on posterity. However, the name and the life of JI Zhai, is seldom known by the people. According to the record in the Biography of Physicians of Past Generations in China, JI Zhai took his mother's surname. According to the County An-nals of Huoshan cited by Research on Chinese Medical Books of Xin' an of WANG Le-tao, the name of JI Zhai is Ye Feng, another name is Weifeng, the alias is JI Zhai. Ji Zhai made a sign of "ZHANG Ji-zhai's recording" in the marginal notes of Jizhai jiying qifang Jijiumen (emergency section of urgent and rare pre-scriptions of Ji Zhai), which told us that Ji Zhai took his mother's surname of Zhang: his father's surname was Ye. According to the Recording of Gaily-painted Pleasure Boat in Yangzhou of LI dou, Dasheng bian was finished after JI Zhai collected the experiences of Wang midwife in Yangzhou.