There are many reasons why Liu Yanhua, former vice minister of the Ministry of Science and Technology and the State Council Counselor, has such problems. One of the most important points is that our own understanding of the essence of Chinese medicine, the differences between Chinese and western medicine and the methodology of Chinese medicine development is not deep enough, which leads to our inability to introduce Chinese medicine to the world and develop it well. These problems cannot be avoided and must be solved. People often say that Chinese medicine is a treasure of the Chinese nation, but no one can explain why it is a treasure. A large number of books and scholars have described and defined TCM in various languages, but in fact, they have not made clear the essence of TCM. Liu Yanhua believes that the existence of TCM has its rationality. It is a systematic science that uses dialectical theory and causality to explain and treat diseases. Traditional Chinese medicine has its unique methods of diagnosis, expression and treatment, and has characteristics and advantages that can not be ignored in the treatment, rehabilitation, nursing, prevention and health preservation of "disease-free". Moreover, in the process of diagnosis and treatment, Chinese medicine also combines psychology well. In the process of treating people, Chinese medicine will mobilize patients to cooperate and give consideration to patients' psychology while solving their illness. It can be seen that the essence of Chinese medicine lies in its thousand-year inheritance, unique theoretical support and diagnosis and treatment system, and the characteristics of "giving consideration to spirit and practice" and so on. These essences can not be summarized or explained in one sentence, but can be inherited and developed forever.