National debt is a creditor-debtor relationship formed by the state based on its credit and in accordance with the general principles of debt. After investors buy government bonds, they can repay the principal and interest at maturity, or they can choose to withdraw them in advance, but investors may lose some interest by withdrawing them in advance.

For example, investors withdraw electronic government bonds in advance, and the rules for deducting interest are as follows: holding electronic government bonds for less than 6 months does not count as interest. If you hold electronic government bonds for more than half a year but less than 2 years, you will be deducted 6 months' interest. If you hold electronic government bonds for more than 2 years and less than 3 years, you will be deducted 3 months' interest. If you hold electronic government bonds for more than 3 years but less than 5 years, interest will be deducted for 2 months. At the same time, investors often need to pay a certain fee according to about 1% of the redemption principal.