The exchange mainly implements standardized matchmaking transactions. Trading hours are from Monday to Friday (excluding holidays) from 9: 00 am to 1 1: 30, from 13: 30 pm to 15: 30 pm and from 20: 00 pm to 2: 30 pm. The commodities of the exchange include gold, silver and platinum. Gold has four spot trading varieties of Au99.95, Au99.99, Au50g and Au 100g, and Au(T+5), Au(T+D) and Au(T+N 1) and Au(T+N2) are two deferred trading varieties. Silver has Ag99.9, Ag99.99 spot firm trading varieties and Ag(T+D) spot margin trading varieties; Platinum has Pt99.95 spot real trading varieties; China Bank, China Agricultural Bank, China Industrial and Commercial Bank, China Construction Bank, Shenzhen Development Bank, Industrial Bank, Huaxia Bank, etc. As the clearing bank designated by the exchange, it implements the principle of centralized, direct and net fund settlement. The physical delivery of the exchange implements the delivery principle of "one household, one yard system", and 55 designated warehouses are set up in 37 cities across the country, and gold ingots and bars are uniformly dispatched and distributed by the exchange.