A and B are different charging modes and purchase requirements of the same fund.

Haifutong currency, see official website's introduction:

The management fees and custody fees of Class A and Class B funds are the same. The sales service fee of Class B is significantly lower.

Class A shares can be purchased at Haifutong direct sales channel 1 yuan for less funds. See that the lowest share reserved by the sales channel in the penultimate line is 1, which is what it means.

Class B shares are purchased with large amount of funds, and the minimum share retained in the sales organization is 5 million. In other words, if you buy a large amount of funds, you will enjoy a lower sales service fee. So it can be observed that the income of Class A is lower than that of Class B, because the expenses deducted by Class B are low, but the funds are the same.