You can go directly to the Jewelry College of Wuhan Geo University to study their GIC jewelry appraiser course. Although this course is not particularly difficult for professional students, it is certainly difficult for those who have no foundation, but it is not difficult to pass this exam as long as you are willing to bear hardships, listen carefully in class and review carefully after class. I attended GIC jewelry appraiser course in Yunnan, and I attended jade appraiser, diamond 4C grading and colored gems (elementary) course. After passing the exam, each course corresponds to a GIC special certificate. If you pass all these courses, you can get GIC jewelry appraiser certificate. The course cost is about10.4 million. After this course, you will be included in the jewelry door, and there will be other courses to learn in the future. After getting this GIC certificate, you can go directly to the GIA course of American Jewellery Institute without taking the elementary course. I suggest you take a look at official website from the Jewelry College of Wuhan Geo University and see if they also offer courses in Lanzhou, where you can study.