There is a training class outside Sichuan every winter and summer vacation, which is taught by university teachers outside Sichuan. It should be very professional, but it is only available in winter and summer vacations, which is more suitable for zero foundation.
Since I have studied French for some time, I can study in French League outside Sichuan. The lecturers here are all French foreign teachers and China teachers. It is a very authoritative educational institution. Last year, the French League was established, and the French ambassador to China and the vice mayor of Chongqing came to have a good training in French and French culture.
I'm not sure about the price of the French Union. The teacher training outside Sichuan is about 3,000 yuan.