In the Romance of the Three Kingdoms, a 14th century Chinese novel on the period of the Three Kingdoms in the 3rd century, Zhuge Liang is credited with the knowledge of a secret art known as the qimen dunjia.
This secret knowledge enables him to plan his military operations and to forecast wind. This lecture explains the qimen dunjia, which was one of the dunjia methods known only to very few people. It was the dunjia method in Song China and in the 11th century, it was one of the 3 systems included in the syllabus for candidates taking examinations in the Astronomical Bureau.
Using the matrix of calculating the astronomical data, experiential pattern and time-space analogical elements, these methods were employed to make predictions on the weather, military operations and human affairs, particularly those referring to the Emperor himself.
In the Romance of the Three Kingdoms, Zhuge Liang takes full advantage of his knowledge of these systems. The calculations of the qimen dunjia and its application in military affairs and meteorological predictions is still unexplore in the modern days… may be its already being applied in China.