Address: Xicheng District, Beijing

2. Beijing Gaode Jewelry Appraisal Institute

Address: Room 503, Block A, China Craft Building, Jixiang Lane, Chaoyangmenwai Street 103.

3. Beijing Zhong Da Jewelry Appraisal Center Beijing 798 Branch

Address: Area A, Beijing 798 Art Zone, No.2 Jiuxianqiao Road, Chaoyang District, Beijing

4. Testing Center of Beijing Zhongwei Baojingzhubao Jade Appraisal Co., Ltd.

Address: Room 6 10, Tower A, Oriental Tulip Building, No.216, Li Tang Road, Chaoyang District, Beijing.

5. Appraisal Center of the World Jewellery Chamber of Commerce

Address: Pingyuan Li 2 1- 1