Can the topic of graduation thesis have nothing to do with this major? I am not interested in the direction of my professional thesis, and it is not easy to write. Can I write if I am interested in other majors? You can't. The topic of the thesis must be related to this major, even if the degree of correlation is not high, but we must not abandon the things of this major and choose the direction of the thesis of other majors.

According to your situation, you can choose the field where this major intersects with other majors, or you can creatively construct the field integration between disciplines.