Not less than 5 years. According to the information network of undergraduate enrollment of Sichuan Normal University, if non-Tibetan students want to work in Tibet, the admitted candidates must sign the Agreement on Directional Employment in Tibet with the Personnel Department of Xizang Autonomous Region (Directional Teacher Training Program, Education Department of Xizang Autonomous Region) and the enrollment school respectively. Having worked in Tibet for not less than 5 years after graduating with a diploma and a degree certificate. Sichuan Normal University, referred to as "Sichuan Normal University" or "Sichuan Normal University", is located in Chengdu, Sichuan Province. It is a key university in Sichuan Province, the first batch of universities in China to implement the "Basic Capacity Building Project for Universities in the Midwest", and a national model school for deepening the reform of innovation and entrepreneurship education.