It depends on how old you are. If you represent all counties, it will be very expensive. There may be 70,000 to 80,000 in small counties, but the big estimate may not be 100,000.

You can choose a single school agent, and you can try less if you haven't done it in the early stage.

You can consider "Ijiaer", a primary school math course, and the joining fee is not expensive.