How to define a transaction in futures trading, whether buying and selling is a transaction or two transactions, and whether opening a stock index is ten or five times?

According to the pen, it is necessary to place an order successfully at one time, even if it is a sum, no matter how many hands you place.

You have ten hands at a time and five hands at a time.

A transaction includes opening and closing positions, that is, closing positions at one time to complete a transaction.

Opening a stock index requires ten commodity futures trading records.

I don't know how to keep asking. I just helped a client with the stock index formalities yesterday.