In recent ten years, the number and level of laparoscopic colorectal surgery by Professor Zhang Jianli ranks first in the province and the top three in the country. This has filled the gap in Shandong Province and reached the international leading level. It was reported by Qingdao Daily, Qingdao Morning Post, Qingdao Evening News, peninsula metropolis daily and Qingdao TV Station. , and went to the United States, Hong Kong and Guangzhou for training and experience exchange. Doing surgical demonstrations and giving lectures in more than 50 hospitals across the country. Presided over the provincial continuing education class "New progress of laparoscopic colorectal treatment" every year, which was widely praised. At the same time, he actively carried out scientific research, participated in the preparation and publication of 2 monographs, published more than 20 papers, and presided over the completion of a number of scientific research projects. Among them, the research on the protection of pelvic autonomic nerve by laparoscopic colorectal surgery has reached the leading level in China; The analysis of risk factors of conversion to laparotomy in laparoscopic colorectal resection and the establishment and application of scoring system have reached the international leading level.