Printed school bag.After the sample is sold, if the first version needs to be modified, we will modify the sample according to the modification details. This process is completely free.We will inform you of the production progress of the order product in time during the production process, so that you can understand the order status faster.We will keep in touch for 24 hours. We will use efficient communication to ensure smooth information communication.Strictly control product quality and deliver it to you with a 100% pass rate.We will do everything possible to save you costs.