According to the loan market quotation (LPR), the one-year loan interest rate of China Agricultural Bank in 2023 is 3.45%. . Therefore, if the loan is 30,000 yuan, the annual interest can be calculated as follows: 30,000 yuan ×3.45% = 1.035 yuan. This is estimated according to the current loan interest rate, and the actual interest may change according to the specific circumstances of the loan.