Not much, Hangzhou tycoon jewelry is formal and reliable. Inquired by the Linping District Market Supervision Administration of Hangzhou, Hangzhou Daheng Jewelry has a special business license and each piece has a certificate. Hangzhou Daheng Jewelry Auction Co., Ltd. (formerly known as Hangzhou Daheng Jewelry Co., Ltd.), established on 20 17, is located in Hangzhou, Zhejiang Province, and is an enterprise mainly engaged in manufacturing cultural, educational, industrial, sports and entertainment products.