What do you mean by "yin killing"

Cold kill. In the Book of Rites, the moon is the moon, and the son of heaven taught him to hunt in the fields and learn the horse administration of the Fifth Squadron. Tang Kong Yingda said: "The son of heaven taught him to hunt in the fields and kill people here, so he taught people to use tactics." Hunting in the field means teaching because of hunting. "

Word decomposition

Interpretation of Yin Yin ● China's ancient philosophy holds that the universe runs through two opposite sides of all matter, opposite to Yang: Yin and Yang. One yin and one yang is the Tao. Mistake. Yin flourishes while Yang declines. Yin deficiency generates heat. Refers to the "moon": the moon. Lunar negative electricity: negative electricity. Cathode. Anions. The explanation of killing (killing) makes people or animals lose their lives: killing. Kill the enemy. Kill the goose that lays the golden egg. Make an example of others. Fight, fight: in pairs. Cut: spoil the scenery. Drugs and so on stimulate the body to feel pain: soapy water kills the eyes. Closed beam: bargaining. Kill the tail and tighten, fasten: kill the car. Used of verbs.