Introduction to the inscription of the Immortal City of Desire: A large flat rock in front of Qingzhi Temple is engraved with the four characters "The Immortal City of Desire", which comes from Tao Hongjing's "Thanks to Zhongshu". It can be summarized in an idiom as "heaven on earth". "Desire" here means "desire". Buddhism divides the world into the realm of desire, the realm of color, and the realm of colorlessness. The realm of desire is the realm of beings who have not escaped from the seven emotions and six desires of the world, that is, the human world. "Xiandu" is the beautiful world where gods live.