The "inventory" item shall be filled in according to the ending balance of raw materials, inventory goods, delivered goods and turnover materials minus the ending balance of inventory depreciation reserve.

Futures is a trading method that spans time. By signing the contract, the buyer and the seller agree to deliver the specified quantity of spot at the specified time, price and other trading conditions. Usually, futures are concentrated in futures exchanges and traded in the form of standardized contracts, but some futures contracts can be traded through over-the-counter trading, which is called over-the-counter trading contracts.

The English name of Futures is futures, which evolved from the word "future". Its meaning is that both parties to the transaction don't have to deliver the goods at the beginning of the transaction, but * * * agree to deliver the goods at some time in the future, so China people call it "futures", and futures are the biggest trading means besides foreign exchange.

Futures market first appeared in Europe. As early as in ancient Greece and Rome, there were central trading places, bulk barter transactions and exchange activities with the nature of futures trade. The original futures trading developed from spot forward trading.