If you have invested for 3-5 years, it is a long-term investment, so it depends on the performance of the fund in the past three years. These three years' good performance are recommended to you: Huaxia Advantage, Morgan Stanley Resources, Guangfa Jurui and Guo Fu Tianhui.
Considering your risk tolerance, recommend Morgan Stanley resources. This fund is relatively stable and the fund manager has strong operational ability.
As for the front-end and back-end charges you mentioned, this is determined by specific funds, and Morgan Stanley is the front-end. Of course, if you invest for a long time, the back-end charges will be almost gone by then.