Introduction to the sacred tree: According to legend, young lovers who visit the Valley of Lovers will get married and grow old together. Only when lovers support each other and become intimate can they climb and travel. In the ditch, there is a strange pine tree growing in the crack of the rocks beside the stream. It has the number "?" written upside down. According to folklore, when young lovers come under the tree, no matter the man or the woman, they can ask each other any questions without causing any resentment, but will instead enhance the friendship between the two parties. For this reason, people call this tree the "sacred tree". It is also said that everyone will become holy when they come under the "sacred tree". It is puzzling that the charm of nature can be so profound.