Beijing Zhongce Lianyun Jewelry and Jade Quality Inspection Technology Research Institute has CMA (China Metrology Certification) qualification, which shows that it has certain inspection and testing capabilities, but it has not found evidence that it is a national inspection institution (national inspection). National testing institutions usually refer to testing institutions certified by relevant state departments, which often have high authority and professionalism. Although Beijing Zhongce Lianyun has relevant qualifications, it does not directly indicate that it is a national testing institution. Therefore, Beijing-China policy Lianyun does not belong to the national inspection.