Essence of famous doctors of the Qing Dynasty Essence of medical cases of Zhang I-Qing

**Summary:** This article presents a collection of rare and valuable medical cases from the Qing Dynasty, highlighting the exceptional expertise of Dr. Zhang Yüqīng. The cases, compiled into *Yīn Shì Guǎng Xì: Zhang Yüqīng's Medical Cases*, offer insights into traditional Chinese medicine and its application during the Qing era. Each case is carefully analyzed, showcasing the historical significance and medical wisdom of early practices in Chinese medicine. The article emphasizes the importance of preserving these historical medical records for future generations and the value they hold in understanding the evolution of Chinese traditional medicine.