

The five-color military flag, "gold, wood, water, fire and earth", white for gold, blue for wood, black for water, red for fire and yellow for earth.
In ancient times, there was no such advanced information technology as modern, and the battlefield situation was changing rapidly. If there was no clear visual language instead of military information and action orders to communicate, military aircraft would be delayed. In the vast ancient battlefield for the rapid and accurate transmission of information needs, military language was born. Among these complex flag languages, the Five Elements theory, which has the characteristics of Oriental philosophy, has influenced all aspects of military actions with a concise language system. The ancients associated the five elements with military information and military orders and created the "Five square Flag", also known as the "Five Elements Flag". The five elements are matched with the five colors, namely "white, blue, yellow, black and red".
If you meet an enemy while marching and the weapon is made of metal, the weapon represents the enemy and is associated with "gold", the flag bearer of the five square flags will hold a white flag corresponding to the "gold" element in the five elements. If the vanguard comes across a dense forest and is blocked, the tree is associated with "wood" and the flag bearer will raise a blue flag corresponding to the "wood" element; In case of enemy fire attack, fire attack is related to "fire", then it is necessary to raise the red flag corresponding to "fire" element; If marching near a lake or a river is related to "water", a black flag corresponding to "water" will be raised; If there is a wide flat land ahead and no emergency situation occurs, the flag bearer directs the troops to pass safely. Since the flat land is associated with "soil", the yellow flag corresponding to the "soil" element is raised.