Others are not allowed to transfer money to the investor account. Whether it is a stock account or a fund account, it can only be associated with the investor's own bank card, and there is no other channel to transfer money to the investor's own account.
Investors want to put other people's money into their own fund accounts. The only way is to transfer other people's money to your own bank card first, and then transfer it from your own bank card to your own fund account.