Learning Objective: Shopping is something that happens almost every day in our lives. With the popularization of the Internet, the advantages of online shopping have become more prominent and become an important form of shopping. Online shopping first retrieves product information through the Internet, then sends a shopping request through an electronic order, then pays online through a bank account, and finally the merchant delivers the goods by mail order or delivers them to the door through a courier company. Taobao is not only the most popular online shopping platform in China, but also has nearly 500 million registered users. There are more than 60 million regular visitors every day, and the number of online products every day has exceeded 800 million, with an average of 48,000 products sold every minute.