As far as schools are concerned, Yunnan University is the best in terms of both teachers and school rankings. But the two majors you mentioned, architecture and machinery, are better, because they are engineering majors, that is, Gong Kun. Compared with machinery, architecture is obviously superior. Gong Kun's architecture is a regular five-year architecture major, which has passed the evaluation and is still quite good. If you have to choose between the two, the building must be good. However, the best major in Gong Kun is mining and metallurgy, and it is the top major in China.