In ancient Chinese myths and legends, there is a world of ghosts, in which there is a mountain. There is a big peach tree 3,000 miles up the mountain, and there is a golden rooster at the top of the tree. Whenever the golden rooster chirps in the early morning, the ghosts who go out at night will rush back to the ghost domain. The gate of the Ghost Domain is located in the northeast of the peach tree, and there are two gods standing by the door, named Shen Tu and Yu Lei. If the ghost does something evil at night, Shen Tu and Yu Lei will immediately find it and catch it, tie it up with a rope made of mango reed, and send it to feed the tiger. Therefore, the ghosts in the world are afraid of Shen Tu and Yu Lei. So people carve them into peach wood and put them in their doorways to avoid evil and prevent harm. Later, people simply engraved the names of Shen Tu and Yu Lei on the mahogany board, believing that doing so could also eliminate evil. This kind of mahogany board was later called "peach talisman", and later formed the traditional habit of sticking door gods during the Spring Festival.