Why can peach stones ward off evil spirits?

It means to ward off evil spirits. People in ancient China believed that peach wood had magical power, so during the Spring Festival, they cut peach wood into human shapes (peach people), cut peach wood into boards (peach boards), carved peach wood into seals (peach seals), tied peach branches into brooms (peach purlins) and hung them by the door to ward off evil spirits. Why did the ancients think mahogany could ward off evil spirits? According to ancient records, where Shen Tu and Lei Yu, brothers in charge of all kinds of ghosts, live, there is a huge peach tree, which is the "gate of hell" for all kinds of demons to enter and exit. The two brothers usually sit on both sides of the gate of hell. If they find evil spirits, they will kill them with peach sticks, then tie them with reed ropes and throw them into the valley to feed the tigers. Peachtwood is their weapon against evil spirits. Besides, in the famous story of "Kuafu Chasing the Sun", Kuafu, a giant who raced with the sun, was badly burned and extremely thirsty. He lost his life on his way to Daze in the north. Before he died, Kuafu threw his wand into the air and turned it into a peach grove. There are many fresh peaches on the tree. Kuafu hopes that future generations can conquer the sun like him, because there are peaches on the roadside. It can be seen that peach wood has long been a very useful "Shenmu" in the minds of ancient ancestors. The custom of hanging peach charms later evolved into only writing the names of Shen Tu and Lei Yu on the mahogany board, or just drawing some charms, called "carving peach charms". Fu Tao's inscriptions developed into antithetical sentences, warning sentences and auspicious sentences in the Tang and Five Dynasties, which is the origin of Spring Festival couplets. Fu Tao has also evolved into a keeper, especially in rural areas. During the Spring Festival, in addition to posting Spring Festival couplets, you should also post a door god. Spring Festival couplets are pasted on the left and right door frames, and door gods are pasted on the two doors. As for the portrait of the gatekeeper, besides Shen Tu and Lei Yu, in the Tang Dynasty, Zhong Kui, the ghost king, was added. At this point, the mythical color and folk cultural significance from mahogany have also been more widely used.