When you open an account, you are always assigned a fund account number. Because it is your first time to buy a fund, you have just submitted an application for opening an account, and the fund account number has not been allocated, so it is called "pre-opening an account".

Pre-opening an account in an enterprise bank refers to the process that an enterprise fills in the application materials for opening an account online before going to the bank to open an enterprise account, and then clicks Submit after completion, and the bank receives your application for opening an account.