I want to know something about the dual university in Germany.

The dual culture system you are talking about is not a regular university or FH, but BA (=Berufsakademie). Theoretically, you are an employee of the company from the beginning, and you also have a work contract, and the company pays you to go to class for training or something. The advantage is that if you find a suitable company, the chances of getting a job there after graduation are quite high, because since the company has spent so much money to train you, it will generally try its best to keep you. However, this kind of university is not at the same level as Uni, and you can't directly apply for a PhD after reading it. If Uni in Germany is equivalent to a key university in China and FH is equivalent to an ordinary university, then BA is actually closer to a college in China.

There is also the fact that there are not masters everywhere in Germany. Only a few people in key middle schools (= gymnasiums) here in Germany choose to go to university after graduation, because the earlier they work in Germany, the more money they get. If 18 years old or 19 years old enters the enterprise, even junior technicians will still get more salary after working for seven years than those who just graduated from college. Even fewer people have doctorates, and it is even more difficult to learn engineering doctorates. Some subjects can easily consume you five or six years. After studying, you are all over 30 years old and have no work experience at all. Ordinary small and medium-sized enterprises (I'm not talking about giant multinational companies like Siemens) won't hire such people with high salary starting point and no practical ability. Unless I plan to take the road of scientific research from the beginning, few of my college classmates plan to continue studying for a doctorate and find a job after graduation.

Discrimination against foreigners certainly exists, but the German government attaches great importance to it. In his New Year message on the radio yesterday, the German Chancellor also mentioned the need to crack down on neo-Nazi activities more severely. In fact, the green card does not have the high authority to stay in Germany for a long time. After taking a long-term residence, the benefits of German citizens are almost the same (except that they can't vote). After working in Germany for eight years, you can stay for a long time and apply for naturalization. You don't need to marry a German at all. China and his wife, who are all Germans, are not married for the second time after marrying a foreigner.