Tongji University's preparatory course for studying in Germany is specially designed for studying abroad, but the price is relatively expensive. This is a newly improved textbook.
If I go abroad, one of my classmates has been there, and it seems that I have traveled all over Germany.
My own experience is that learning similar grammar textbooks first, that is, after you have laid a solid foundation in German grammar class, you will feel a great sense of accomplishment when you go to Germany to study and travel, because most of the rest are vocabulary problems, so I suggest taking a systematic basic grammar class first, and then reporting to the academic center of Tongji University.
In addition, to what extent, in fact, no matter what textbooks are truly understood thoroughly, and there are many other involved, the intermediate level is definitely no problem! ! ! It will rain like that in Mao Mao, hee hee! !