Liang Yu-yu, styled Teyan, was a native of Maoming, Guangdong. He once served as the prefect of Zhendi in Xinjiang. His family had been practicing medicine for generations, and he primarily diagnosed illnesses by examining the tongue, favoring the use of cold and cooling medicines in treatment. Tao Baolian, styled Zhuocun, was from Xiushui, Zhejiang. Due to his frail health and frequent illnesses, he delved into medical texts. Frustrated by the difficulty of understanding pulse diagnosis, he long admired the "Cold-Damage Disease Tongue Mirror" and hoped to master the method of tongue inspection. However, despite searching for over twenty years, he never managed to obtain the book. In the 19th year of the Guangxu era (1893 AD), Tao traveled to Xinjiang, where he fell ill and sought medical treatment. His condition worsened and did not improve until Liang treated him using tongue inspection and prescribed medicine. Tao then sought to learn Liang's methods, but Liang refused to divulge his family's medical secrets. Later, Tao finally acquired the "Cold-Damage Disease Tongue Mirror" and showed it to Liang. Finding it vastly different from Liang's family medical techniques, Tao questioned each point, and Liang corrected the errors and biases. Tao recorded several points daily, and after three months, completed a two-volume book titled "Tongue Mirror Analysis and Correction."