The only difference is the charging method. Class A is suitable for long-term investors and must be held for at least 1 year, while Class C is suitable for investors with short holding period. Investors can choose the corresponding category according to their investment period. If you don't have a plan, you'd better choose Class C because it doesn't cost too much to replace it.

If you don't understand, sincerely welcome questions; If I am lucky enough to help you, please adopt in time! thank you