This code field is part of your ordering process. As long as you choose a variety, the code will be filled in automatically, so you don't have to worry. Your question may be about the contract code. Let me give you an example. For example, the code for copper is CU. If you want to buy the contract of copper CU0909 (that is, the contract to be delivered in September 2009, you should understand it), then you can enter the number of lots to open the right transaction in the contract and you can place an order. It seems that you are a novice, but the trading software of Hongye Futures seems to be out of date. Now you don't need to fill in the code or display it directly, you can also book the contract directly, saving time.

I'm tired of typing so much. If you have any questions, please communicate directly. My QQ346943544.