The course is themed on the evolution of social media in China. The first part introduces the letter culture of ancient China, including bamboo slips, silk books and paper letters, and then we will read a classic letter. The second part introduces the changes that have taken place in social media in modern China and the classic application software, hoping to help you better understand the current way of communication in Chinese society. In addition, several Vlogs have been prepared to show a new life scene and campus culture with sound, image and editing art.