In ancient China, birds like swallows liked to nest under the eaves of buildings. In order to drive them away, eaves bells and iron horses (that is, iron plates) were also set up. In ancient times, one of the names of wind chimes was "Iron Horse". The "iron horse" hanging at the corner of the tower eaves temple in China is called "wind chime", which is also a kind of "bell duo" The fifth story of Luoyang Galand says: "When the sun rises, the golden plate will shake;" When the breeze rises, Baoduo will sing. " This is where the charm of "Fengduo" is described. In addition, there are antique "Fengduo" in Horyuji, Tangzhaoti Temple and Keya Mountain. According to the contract, "Lingduo" is in the stupa temple, and the world will be applauded. In the ceremony of opening the door to worship, he said: "The sound of guarding horses is provided by the clock. "This is a story about Shi Zun's disciple Bai. Many lifetimes ago, monks gave alms, and "Fengduo" (iron horse) hung under the eaves of stupa. So I think the sound is more elegant from generation to generation, which is enough to touch the achievements of animals.