Yes Yayu Jianbao Jewelry Store in Tengchong City is located in Baoshan City, Yunnan Province, and is engaged in the appraisal and evaluation of handicrafts and collectibles. Tengchong Jianli Jewelry and Jade Appraisal Co., Ltd. is located in Baoshan City, Yunnan Province, engaged in jewelry and jade appraisal services. In order to protect the cultural relics of the motherland and study the evolution law of antiques, it is necessary to study their production age, authenticity and artistic level. The research process is called antique appraisal.