Learning French in Nanjing is zero-based.
I was in Ligue 1, and there was a class that started for 500 hours. This class has advantages and disadvantages. The advantage is that it was taught by the French. You know French pronunciation is very important at the beginning. If the teacher who just started teaching you French has an accent, you will have an accent all your life, so this is definitely no problem in Ligue 1. However, French teachers teach French League, so there will be problems with grammar, and China pays more attention to grammar in the exam, so I personally suggest that you study French in French League.