After closing a Pinduoduo store, if there are any unpaid fees, they need to be paid within a certain period of time. The specific payment method can be operated through the "Store Management-Settlement Center-Bill Management" on the Pinduoduo platform, select the fees to be paid, and make the payment. Payment methods include Alipay, WeChat Pay and other methods. The specific payment process varies depending on the payment method selected. It should be noted that if the fees are not paid after the deadline, it will affect the subsequent operation of the Pinduoduo platform.