[Explanation]: Heaven and earth: realm. The metaphor has a different dimension. Describing the realm of a landscape or artistic creation is fascinating.

【Idiom Story】:

The idiom "there is no heaven and earth" means that there is another realm. It also describes the scenery as fascinating.

This idiom comes from the Complete Works of Li Taibai. Q&A in the Mountains", asked Yu what he meant to live in Bishan, laughing and not answering. The peach blossoms are gone, and there is no heaven and earth in the world.

Li Bai, whose name is too white, is one of the greatest poets of the Tang Dynasty in China. His ancestral home was Chengji, Longxi (near present-day Tianshui, Gansu), and he was born in Xiaye (present-day in the CIS) and grew up in Qinglian Township in Mianzhou (present-day Mianyang, Sichuan).

When Li Bai was young, he loved swordsmanship, light money and righteousness, and was good at writing poetry. At the age of 25, he wore a sword, said goodbye to his relatives, left his hometown, and traveled far away. In the past few years, he has roamed many places in Hunan, Hubei, Jiangsu, and Zhejiang. He was talented, ambitious, and eager to participate in political activities, but in the dark officialdom, his bright mind and unyielding character were unpopular, so there was no result for more than ten years.

At the age of forty-one, Li Bai was summoned by Tang Xuanzong, and his talent became a sensation in Beijing. But at that time, Tang Xuanzong was a "Taiping Emperor" who was bent on pursuing pleasure, and the state affairs were manipulated in the hands of the traitor Li Linfu and the eunuch Gao Lishi. Tang Xuanzong only hoped that Li Bai would be a royal literati who sang praises of virtue. However, Li Bai had an arrogant temperament and did not have the slightest flattery in front of the emperor and magnates, so he was slandered by Gao Lishi and others, and gradually became untrusted by Tang Xuanzong.

When Li Bai saw that Tang Xuanzong really did not reuse his intentions, he was worried that he would be harmed by the slander of the villain, so he automatically asked to leave the imperial court. During his three years of life in Chang'an, he recognized the darkness of reality and the corruption of the rulers, and wrote many poems with profound ideological content.

After leaving Chang'an, Li Bai began another ten years of roaming life. Due to repeated setbacks in real life, he had the idea of seeking immortals and visiting the Tao, hoping to get rid of the ugly reality and pursue a better life. "Questions and Answers in the Mountains" is a poem written by him in pursuit of a beautiful realm, and the poetic meaning is like this: Someone asked me why I lived in Bishan, and I smiled and did not answer, and my heart was at ease and leisurely. Look at the peach blossoms floating freely with the flowing water into the distance, there is another realm here, different from the dark and filthy world.