1, stock index futures, like commodity futures, are all trading futures contracts, but the difference is that the subject matter of commodity futures is actual commodities, while the subject matter of stock index futures is stock index.

2. To trade stock index futures on China Financial Futures Exchange, you need to open an account in a futures company, not a securities company.

3. Securities companies can introduce customers to futures companies as IB (stock index futures introducer) and get commissions, but customers' transactions must be conducted through futures companies.