If you open an account with the same fund company in different banks, the subsequent accounts will be invalid. If you want to buy the products of the same company through different banks, you need to inform the bank fund company's TA account number when opening an account in the first bank, otherwise the bank will still open a new account, and this account opening will fail because you have already opened an account in another bank. TA account number can be checked through the website of the bank or fund company after the account of the fund company opened by the first bank is confirmed. It doesn't matter if you want to buy some fund companies' funds in one bank and other fund companies' funds in another bank. For example, if you bought the products of ICBC Credit Suisse Bank Fund Company at ICBC, it is ok to buy the same products through China Merchants Bank in the future.