If it fails, it may be due to the following reasons:
1. You haven't redeemed it all, and the redemption share is insufficient 1000 (i.e. 1000 yuan).
2. You intend to redeem it all, but your share has changed since the money fund just paid dividends on the redemption day, so your redemption is not all, and the redemption share is less than 1000.
Generally, money funds pay dividends once a month, which is fixed in the form of dividend reinvestment, so your share will change after each dividend, which requires special attention.