1. Appraisal scope: Zhongjiang jewelry appraisal mainly focuses on the appraisal of valuables such as jewelry and jade, while Zhongke appraisal mainly focuses on the appraisal of cultural relics and artworks.

2. Institutional background: Zhongjiang Jewelry Appraisal is established and managed by China Jewelry and Jade Association, an authoritative organization in the jewelry industry, and Zhongke Appraisal is established by the Institute of Cultural Relics and Archaeology under the China Academy of Sciences, which is a professional institution in the field of cultural relics and arts.

3. Assessment methods: There may be some differences in assessment methods between the two institutions, because they focus on different fields and experiences. Jewelry appraisal in China may use scientific methods such as optics and chemistry to identify the authenticity and material characteristics of jewelry. The identification of science and technology in China may use the expertise of cultural relics, archaeology, and ray detection to identify the authenticity and age of cultural relics.