Starting from the acceptance of the NMP recovery device, the entire recovery device will be provided with a 12 month free warranty. Within 12 months, any manufacturing quality issues or non-human damage can be covered by free warranty; If the device malfunctions due to customer reasons, the customer will pay for the replacement parts and we will provide free maintenance; Guide customer company personnel to familiarize themselves with and master the device, and provide timely answers to customer questions; Assign professional maintenance personnel to visit regularly or irregularly every year, and guide customers in their daily maintenance work; When there is an abnormal quality situation in the recycling device, we will send professional maintenance personnel to the customer's site for repair promptly after receiving the information; If there is a general malfunction in the recycling device, and upon receiving a call from the customer, if the problem cannot be solved through telephone or remote service, our professional maintenance personnel will arrive at the customer's site promptly to troubleshoot the problem; If there is a functional malfunction in the recycling device, maintenance personnel will troubleshoot it within 3 natural days.