Yingying Tower is a typical ancient tower in Tang Dynasty. The plane is square, with dense eaves structure and hollow inside. Similarly, there are famous Big Wild Goose Pagoda and Small Wild Goose Pagoda in Xi 'an. However, because of its long history and hardships, few ancient pagodas in the Tang Dynasty can be preserved until now. In Yingying Tower, someone heard waves of people crying, but they couldn't find anyone everywhere. This noise of unknown origin casts a mysterious veil over this place. After some investigation, it was found that the strange sounds from the tower were not only crying, but also singing and frogs. Moreover, the source of these voices is unknown, and there is no clue in the history books. Yingying Pagoda, a Millennium ancient pagoda, suddenly made such an unknown sound. What scientific way should be used to solve it? Yongji city's Pujiu Temple used to be a place of incense in the period of Wu Zetian, and it became a household name because of a story about the West Chamber. There, there is a Yingying Tower. Some people say that standing under the tower can hear toad's voice, while others say that they can hear someone crying. In fact, not only people cry, but also people have heard very clear songs. Why does this mysterious ancient pagoda make strange noises frequently? What's the connection between these strange sounds? What is the secret of this? (riddle guessing network //lishixinzhi) Strange sound 1: There was a shout from the tower. 1September 1986, the restoration of Pujiu Temple is under way. Suddenly, a worker heard a strange sound. The voice was intermittent, coming from Guttari in the temple. Listen carefully. It sounds like a human voice. During the restoration of Pujiu Temple, outsiders are strictly forbidden to enter. Who will break into this ancient pagoda? Why are you so sad and don't cry? Strange voice 2: singing opera sounds in the tower. In the conversation with Yi Tong, the author found that he was not only shocked by the crying in the ancient pagoda, but also dismissed it. Later, I learned that the scenes he experienced were far more confusing than what we knew. Yi Tong said: "At 1987, when we are in the process of restoration, we have nothing to do at night. Everyone sat under the tower and chatted. Suddenly, we heard how the opera was sung in the tower, which was very clear. The actor's singing is very clear. Everyone says it's strange! "There were songs and dances in the stupa around me. The workers are confused and want to know who is singing in the tower. But this mysterious man seems to have played a game of hide-and-seek with everyone. Walking into the tower, there was no one in it, coming out of it, and singing came from it. Almost every corner of the temple can hear the sound of beating gongs and drums. I looked everywhere inside and outside the stupa, but I couldn't find anyone.