Other training courses are organized by New Northwest and Study Abroad Service Center. Most of these training courses are aimed at people who go abroad for intensive language training.
If you are a student, I suggest you apply for a minor. You must be a student to take an inter-school minor. First, the formal, public and minor certificates are recognized by the Ministry of Education (the minor certificate is also signed and stamped by the principal, and other training courses do not even have proof of study); Second, it is cheap. The study of the same 500-hour study abroad training class costs 5000 yuan and takes 1 month. Minor for one year 1500, the third is teachers. Generally speaking, teachers who minor in various languages are better than other training courses. I'm not sure about German. Ask yourself. It is said that Japanese teachers speak very well, unlike some training courses that invite some senior students to give lectures. But there will be exceptions. For example, in some small languages, the college lacks teachers, so students who come back from abroad should take the place, but they are very responsible.
I hope I can help you!