Extension: WeChat facial expressions are a common way of nonverbal communication in social networks, and people can express their feelings and intentions more intuitively through facial expressions. In addition to shy expressions, WeChat has various other expressions, such as happy, angry, surprised and so on. Every expression has its own unique meaning and emotional expression. By using appropriate expressions, we can convey our emotions more accurately and enhance the expressive force of communication. At the same time, expressions also add fun and vitality to chatting and make communication more lively and interesting. Therefore, using appropriate expressions in WeChat chat is a very common way of communication, which can better convey emotions and understand each other's feelings.