As a German, I was surprised to find out that my Chinese friends learned a lot of German history in school. Not just about the Third Reich, but also 19th-century historical figures like Marx (obviously due to his ideological importance) and Bismarck, the Weimar Republic and some things I don't recall right now.

It's certainly more than I was taught about China in turn. I don't think even the German colonial presence in Qingdao was ever mentioned.