Emoji. Emoji has become an indispensable part of modern people's daily life, because it can convey emotions and intentions without words. In addition, the widespread use of pictures and images on social media and the Internet has also replaced the use of words to some extent. For example, on photo social software, people can express their feelings and experiences by sharing photos and pictures instead of using a lot of text descriptions. These trends show that people are more and more accustomed to using pictures instead of words to express information and emotions.