How do you say that every three years, it will be transferred to one year regularly?

Change the term from three years to one year: after the expiration of three years, you can deposit a one-year deposit certificate. After the three-year deposit expires, go to the bank and take it out with interest, then put what you need at home, and the rest will go to the bank to open an account. Waiting in line for the station call, I sat down and said, hello, I want to deposit a one-year deposit, and then asked what the interest is now, and the first-and third-class staff would deposit it if they think it is appropriate.