I just came into contact with a company called "Hero Education", next to Nanning Department Store in Guigang. I saw it in the school publicity before, and the teacher there said that while training English, I can also give extra-curricular tutoring to other subjects for free. I don't know the details. I heard from other parents that the environment there is very good and the teachers are not bad. Let's have a look at it sometime. I hope my point of view can help you!