Hello, there may be the following reasons for the failure of reverse repurchase operation:

1. Bond pledged repurchase authority has not been opened;

2. The selling column should be used instead of buying;

3. The quantity is entered incorrectly. Shanghai Stock Exchange should enter 1 or an integer multiple of 1, and Shenzhen Stock Exchange should enter an integer multiple of 1 or 1;

4. insufficient funds are available in the account;

5. The Shanghai Stock Exchange needs to open a shareholder account in Shanghai or a fund account in the Shanghai Stock Exchange, and the Shenzhen Stock Exchange needs to open a shareholder account in Shenzhen.

if the above reasons have been ruled out, you can consult the customer service of the brokerage firm.