As one of the main participants in the futures market, the exchange plays an important role. Responsible for formulating implementation rules, reviewing contracts, supervising trading activities and providing information transparency. Collect and publish all kinds of data related to market operation. The futures exchange will also collect and publish information about commodity inventory levels. By carefully recording positions, warehouse receipts, actual logistics and other factors, it can provide an objective and accurate indicator to reflect the changing trend of specific commodity inventory, which is recognized as one of the most authoritative and reliable sources.