The word "Ruyi" comes from the Indian Sanskrit "Ana Law" and is one of the Buddhist instruments introduced from India. The handle is heart-shaped and made of bamboo, bone, copper and jade. When giving lectures, the mage often holds the handle of the book and puts it on the table for fear of forgetting it. A handle of Buddha and monk Ruyi unearthed from the underground palace of Famen Temple in Fufeng, Shaanxi Province, is gilded with silver and has a straight handle. According to the data of the Palace Museum, the origin of Ruyi is closely related to the back scratching tool commonly known as "not seeking" in our daily life. The earliest wishful thinking is to make the end of the handle into the shape of a finger to show that the hand can't reach and scratch, so it is called wishful thinking, commonly known as "Dont Ask For Help". Qing Dynasty's "Records of Foreign Objects" says: "If you are satisfied, you will get an ancient claw stick". In ancient China, there were "tickling sticks" (now called tickling) and "water" (also called "face water" and "hand board"), and both were used as desired. Later, its morphology was divided, and a branch retained its practical function and spread among the people; The other emphasizes auspicious meaning, which has evolved into pure furnishings and treasures, as well as the statue of Bodhisattva with wishful hands.