1# transaction order number, which is randomly generated and unique, and has little impact.

2# product code, the code of spot gold will be different on different platforms, such as XAUUUSD, LLG, gold, etc., which is just a noun and has little effect.

3# account code, useful. It will be sent to the email address you specified when you open an account, and you will use it every time you log in. This is private.