Shanghai Gold, also known as Shanghai Gold, is the common name of deferred settlement business Au(T+D) of Shanghai Gold Exchange. Au(T+D) deferred delivery business is an installment sale. Traders can choose to deliver or postpone delivery on the contract trading day, and at the same time introduce a deferred compensation mechanism to stabilize the contradiction between supply and demand. This trading mode can provide hedging function for gold producers and users, and also meet the investment needs of investors, with low investment cost and high market liquidity; At the same time, it also provides investors with a short-selling mechanism and trading platform, which is suitable for investment and financial management.