This is a money fund. The seven-day annualized rate is just the average return in the past seven days. It does not mean that it will be that high throughout the year. Generally, the annual return of money funds is between 2.5-4%.
Assuming that the interest rate is 4.4990% for the whole year, the interest per day is approximately: 3000×4.4990%÷365=0.37 yuan. Therefore, if it is 3000, the interest per day is approximately 0.37 yuan, and the interest per year is approximately: 134.97 yuan.