Redemption means that you sell the fund, and you can also sell any share you hold at any time during the fixed investment process.
Fixed investment is the same as buying funds in peacetime. Your handling fee will be charged when you deduct money every month. If it is a back-end fee, it will be charged at the time of redemption. Generally, when buying a fund, it is not mentioned, and it is always the way of front-end charging.