Let me talk about my cousin's situation: my cousin's previous grades have been around 80 points, and he has been unable to get through and find a good way. I seem to be looking for He Laoshi in the back. He is on the 8th floor or 10 floor of Jiuding Department Store opposite the municipal government. I graduated from the Mathematics Department of Sichuan University. After I took a tutorial in He Laoshi, I recently heard that my grades were OK. I'm not sure about the other details. I hope this answer can help you!