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  • On May 5, Shanghai, at the Launch Ceremony of the “2023 Shanghai Diamond & Jewelry Culture Festival” and the “Shanghai May Shopping Festival” jointly organized by Shanghai Municipal Commission of Commerce and Pudong New Area Government, Shanghai Diamond Price Index (SDPI) was determined by the National Gems & Jewelry Testing Co. Ltd. (NGTC) jointly with Shanghai Diamond Exchange (SDE) and Gem & Jewelry Trade Association of China (GAC) officially released it.