German citizen applying for business visa in Chinese embassy in Japan

Hello,

I am a German citizen who wants to first study in China and then work there for approx. 3 months. As I first want to study in China, I need a studying type, which I will apply for in Germany. After my studies, I want to travel around a bit (including Japan) and apply there for the needed business type in the Chinese embassy in Tokio. Is this possible as a German citizen or do I have to fly home to Germany and apply there? How does this procedure work?

Thanks in advance!
Best regards from Germany