Two hours. According to official website's inquiry, Yunnan Branch of Beijing Zhongce Lianyun Jewelry Quality Inspection Technology Research Institute and Yunnan Branch of Beijing Zhongce Lianyun Jewelry Appraisal will get the certificate in two hours. Beijing Zhongce Lianyun Jewelry and Jade Quality Inspection Technology Research Institute is a technical service organization focusing on the inspection and testing of jewelry, jade and precious metal ornaments. It integrates inspection and testing technology research, equipment development, software development, product quality inspection and identification and standard revision, and provides customers with all-round and diversified technical services based on product inspection and testing.