There is a withholding agreement, as long as there is enough money in the account.

There are two main forms:

Bank card current account debit is the most common debit method.

In recent years, a relatively new form of "deduction" from the money fund. That is, when the specified deduction time is reached every month, the money fund will be converted into a certain share of the target fund to complete the same fixed investment.

This is mostly the function of fund companies' direct selling websites. Moreover, not all funds support the money fund as a source of fixed investment deduction funds. For example, lof funds can't.