Introduction to the Echo Wall: After passing the archway, you can see the Echo Wall. On the front are the six characters "Namo Amitabha" handwritten by former Buddhist Association Chairman Zhao Puchu, and on the back are the six characters "Avalokitesvara Bodhisattva" in Tibetan written by another eminent monk. The mantra "Om Mani Padme Hum" is also the mantra of Guanyin Bodhisattva.