" Speak human language when you see people, speak ghost language when you see ghosts " was a literary figure of speech that was often used to describe a person who could adapt to all kinds of situations and communicate with the appropriate language no matter who they met. To reach this realm, one needed to do the following: 1. Possess a rich vocabulary and language skills. You must be able to express your own opinions and thoughts accurately, and at the same time, take into account different people's backgrounds, cultures, habits, and other factors to use appropriate vocabulary and expressions. 2. Able to think flexibly and logically. He had to be able to quickly understand the other party's point of view and thoughts, and at the same time, make reasonable deductions and answers based on his own actual situation and purpose. 3. Possess extensive knowledge and cultural background. To be able to understand different fields of knowledge, including natural science, social science, culture and art, and so on, and to understand the differences and characteristics of different cultures in order to better communicate with different people. 4. Be patient and confident. To be able to face different challenges and questions with a calm and composed attitude, and to be confident and courageous in your answers. In order to reach the realm of " talking to people and ghosts ", one needed to have good language skills, flexible thinking and logical thinking skills, extensive knowledge and cultural background, sufficient patience and self-confidence, and many other qualities.