Ningxia teachers' salary

This is the salary table of middle school teachers attached to Ningxia Guild Hall. There are first-class, second-class and logistics service posts on this payroll. Through their salaries, we can know that the salaries of teachers in Ningxia are not high, but there is one thing I can't figure out. The salaries of teachers in Yinchuan are not high. Why are people in the whole city still desperately taking exams in Yinchuan? Some people say that teachers in Yinchuan have good welfare, and the welfare varies from place to place, but the welfare of this school I know is zero. Class begins at 7: 30 am, ends at noon 12, ends at 2: 30 pm and ends at 6: 00. They must stay in the office whether there is class or not. If they are found absent from work, their wages will be deducted.