First, a four-year-old baby should study first. First of all, this is because China is a unique square, and Pinyin is only an auxiliary form for easy understanding. Unlike foreign pinyin characters. For them, there is no way to continue learning without learning letters. China, our excellent cultural tradition, fully embodies the particularity and comprehensiveness of China characters. And it evolved from hieroglyphics, and children know themselves better than they can distinguish sounds. Second, when we speak at ordinary times, it is a kind of pinyin of words. Phonetic word correspondence is the process of recognizing words. When we recognize words, we make full use of the characteristics that children can already speak and associate sounds with words, which is a way of communication in learning. It is easy for children to form a solid memory. Third, words can be seen everywhere. It is full of our living environment, and children's learning is not fixed, so they must sit down and study. We can make full use of the conditions provided by the environment and study anytime and anywhere. To tell the truth, deliberately teaching children to learn word by word is not a child's learning method. Let children learn in games. Entertaining and entertaining, this is a four-year-old child, so we should pay special attention not to arouse children's aversion to cognition. And pinyin, it is easy to cause children's disgust. Because he seldom uses it in his life. Children will be a little disgusted because it is useless.