Hello! I think your question is really interesting. First of all, I will tell you what logo is, which is a sign showing the characteristics of things. It takes simple, obvious and easily recognizable images, graphics or text symbols as its intuitive language. Besides what it represents and replaces, it also has the functions of expressing meaning, emotion and indicating actions. The symbols interpreted by modern Chinese dictionaries are symbols that represent characteristics. Baidu's logo is Baidu, and you will know.