great wall currency A(23) and great wall currency B(213).

the threshold of class a monetary fund is generally 1 yuan or below, while the threshold of class b monetary fund is generally 5 million.

then, when you subscribe for class b currency and your share is less than 5 million, it will be automatically reduced to currency a. On the other hand, when you subscribe for Class A currency, and the accumulated share reaches 5 million, you will be automatically (or can apply) promoted to Currency B..

the income of currency b is slightly higher than that of currency a.