What is Qi Men Dun Jia
Qi Men Dun Jia (奇门遁甲) means mystics door hiding the Jia. It is a time and space energy mapping tool. It maps out the time continuum in 4 categories, year, month, day and hour. In the past, Qi Men Dun Jia is used for forecasting action, activities and their outcomes.
Ancient warriors like Zhuge Liang, Jiang Ziya, Zhang Liang and Liu Bowen had been using Qi Men for strategic decision making (Military or otherwise) in battling wars.