0.3528 yuan -0.57 12 yuan. Change Pass is a monetary fund product launched by Tencent's subsidiaries in cooperation with a number of financial institutions, which can be used for payment. The yield of WeChat change pass fluctuates according to different situations. Judging from the current situation of WeChat Coin Pass, its 7-day annualized rate of return is between 1.604%-2.2 16%. Seven-day annualized rate = principal x interest rate x7/365. Therefore, the seven-day annualized rate = 8000x1.604% x7/365 = 2.46093, 2.46093÷7=0.3528 yuan, or the seven-day annualized rate = 8000x2.216% x7/365. Therefore, the daily income of 8,000 yuan for WeChat change is between 0.3528 yuan and 0.57 yuan12 yuan.