What Crystal Stone College teaches is actually quite practical, but I think it is still relatively old. If you don't have a foundation before, you can study, and it's good to study hard and find a job. Crystal stone is most famous for its architectural performance, and the other majors are very general. Just finished learning crystal stone, the architectural performance is long-term, nine months. Now I work in Guangzhou Crystal Stone Company. I studied fine arts before.
I suggest that if you really want to learn, go to Shanghai Crystal Stone, where the teachers are also very responsible and there are many mistakes in the college. Many strongmen in our company basically graduated from Sheung Shui (I am from Beishui).
As for the diploma you mentioned, I don't think it is very useful. Our company basically has a junior college diploma, and even junior high school has many (old employees). This industry is based on strength!