General training institutions will have a basic salary, then increase class fees, and some sporadic benefits. Work hard and gain more. Generally speaking, it depends on the number of your classes and students. Generally speaking, the salary of teachers in this industry will be above 5000. If you are a teacher with less substitute classes in an institution, you may do some extra part-time jobs and your income will not be much lower. If it is a middle class with a monthly income of 4,000, it should all belong to the middle class.