All the soldiers fighting in front are in array: this is the nine-character mantra, also known as the nine-character Upanishads, and there are nine handprints corresponding to it. The word "Nine Characters" comes from Ge Hong's "Bao Puzi's Inner Chapter Entering the Society" in the Eastern Jin Dynasty: Those who are willing to face the battle will work together. Every nine words, often when the secret desire, everything. The road is not annoying, which is also called. "It means that if you say these nine words silently, you can drive away all evil. Dongmi was influenced by Taoism in China (chanting), but when copying these nine words, it was mistakenly copied as "array (crack) in front" or "array in front", which is still in use today. With the introduction of Japanese comics, it is more familiar to Chinese people. It is an essential process for Japanese ninjas to recite the nine-character mantra before the battle and put out various seals with both hands at the same time.

Simply put, killing evil spirits is exorcism.