I recommend a free cross-border e-commerce application, the Little Boss Amazon Order Management Application (www.littleboss.com), which has a "secondary marketing" function. This function is very good and can automatically push other products in the store to customers who have placed orders. I usually start sending emails to customers after they place an order, so that customers who have placed orders can feel more thoughtful service. For example, after the goods are shipped, I will send an "shipped reminder" email; after the package arrives, I will send an "arrival pickup reminder" email; if the user has signed for it, I will send a "signed for good reviews reminder"; if the package is returned or has other problems, I will send an "abnormal package return reminder" email. Don't underestimate this small detail. Sending an email itself can reflect the professionalism of the customer service, and exposing the products of your own store again at this time can also increase sales. After all, they are customers who have placed an order, so they have a certain degree of trust in the store. At this time, pushing some things that customers may like, or related products, is likely to increase the repurchase rate.