Seizing and exceeding the standard of "ground" weapons

Futures trading is a standardized contract, and this subject matter is the transaction in the contract.

For example, the subject matter of the Shanghai-Shenzhen 300 stock index futures is the Shanghai-Shenzhen 300 index, the subject matter of the Shanghai copper contract is 5 tons of cathode copper, and the soybean contract is 10 tons of soybeans.