How to buy national debt and where to buy it?

To purchase voucher-type treasury bonds, users can bring their valid identity documents to the bank outlets to buy them when issuing treasury bonds; To purchase electronic government bonds, users can log in to mobile online banking and buy them in the column of savings bonds when the government bonds are issued; To buy book-entry treasury bonds, users can go to the bank to buy them, or they can buy them through securities accounts. After purchasing the national debt, users had better choose to hold the debt and redeem it in advance, which will lose some interest income. According to the relevant regulations, if you hold electronic government bonds for more than half a year but less than two years, you will be deducted six 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 1‰ of the redemption principal.