A lot of students in China are encouraged to learn English, which is an international language. However, our mother tongue is Chinese. The Chinese language of a lot of students that learn English is not pure enough. They often have some English words, for example, PK, E era, E-mail, etc. So how to keep Chinese pure and standard is a problem. To solve the problem, we need to do such things. First, we need to learn the correct pronunciation of Putonghua. Second, we need to grasp the four tones of the Chinese characters. Third, it is important that we need to speak to our classmates in Putonghua rather than in English. That is how we can solve the problem.