What's the formula for the spell?

There is no formula to explain this spell in The Journey to the West. ?

The hooping spell first appeared in The Journey to the West, one of China's four major literary novels. The Tang Priest's spell of subduing the Monkey King can make the Monkey King's head tighten and his headache crack. Later used to describe things that bind people.

Source: Wu Ming Cheng En's 14th Journey to the West: "I still have a mantra there, which is called' the truth of the heart', also called' the hooping spell'. You can learn secretly, keep it in mind, and don't let anyone know. "

Introduction of works

The book mainly describes the story of the Monkey King who made a scene in the Heavenly Palace after his birth and met Tang Priest, Pig Bajie, Friar Sand and Bai. He went west to learn from the scriptures, went through difficulties and obstacles, and turned the devil down. After eighty-one difficulties, he finally arrived in the Western Heaven to see the Tathagata, and finally the Five Saints died. Based on the historical event of "Tang Priest's Learning from the Scriptures", the novel deeply depicts the social reality of the Ming Dynasty through the author's artistic processing.