The 5-year, 7-year and 10-year interest rates of special treasury bonds are 2.4 1%, 2.7 1% and 2.77% respectively. Interest on anti-epidemic debts for 5 years and 7 years shall be paid annually, and interest on anti-epidemic debts for 10 years shall be paid semi-annually. Repay the principal and pay the interest for the last year on the due date (the trading day will not be postponed).

For example:

If you bought a five-year anti-epidemic national debt of100000 yuan on June 19, 2021June 19, the interest will be distributed to100000 * 2 in the next two months, three months and four months. By June 9, 2025, the principal and interest will be10000+2410 =102410 yuan, and the five-year principal and interest will be 1 12050.