1, Nantong Culture and Art Jade Appraisal Center, No.37-1South Street, Chongchuan District, Tel: 0513-85911889. Nantong Cultural and Artistic Jade Appraisal Center, Wenfeng Road 1, Chongchuan District, Tel: 0513-85911889. Nantong Emerald Appraisal Center, No.300 Renmin East Road, Chongchuan District, Tel: 05 13-85559780.

2. Yantai jade appraisal institutions include Yantai Jade Trading Center and Zhifu Runde Jade Office.

3. For example, Guangzhou, Beijing, Shanghai, Chongqing and other places have authoritative jewelry and jade appraisal institutions with national qualification certification, which can conduct professional instrument appraisal of jadeite and issue certificates. Big cities with active jade trading, such as Foshan, Zhaoqing and Jieyang, all have professional jewelry and jade appraisal centers, which can conduct jade appraisal.