Four-clock pulse method is an ancient pulse method that has been lost. In the "Huangdi Neijing", only its name and a simple description of the four-clock pulse state are left. In the "Historical Records of Bianque Cang Biography", there are many diagnosis cases of Cang Gong They all use the four-clock pulse method, even Zhang Zhongjing's "The Synopsis of the Golden Chamber" mentions this pulse method, but how to use it has been lost. Now through the concerted efforts of the two authors Fan Jiaru and Lu Junzhi, combined with theoretical construction and clinical verification, we finally took a crucial step in restoring the four-clock pulse method and found the correct way to use it. This book is a perfect combination of traditional Chinese medicine theory and clinical cases. It allows everyone to have both theoretical understanding and case proofs when learning Chinese medicine. Learning to understand the four-clock pulse method can help you understand the precious medical records of ancient Chinese medicine, and it can also help you Have a deeper understanding of "internal difficulties" and open the door to correctly learn "internal difficulties".