What is the salary of the job of librarian?

My sister works as a librarian in the library of East China Normal University in Shanghai. She is an unprepared contract worker. She worked there for 1 years and earned more than 3000 yuan a month. She doesn't have to work the day shift, but she takes turns on duty. She works five days a week and has regular holidays. There are also holidays in winter and summer vacations. So take more rest. Social security and provident fund schools are paid and school lunches are free. Anyway, there is no pressure to mix. The code word is not easy, please accept my answer.