This is a poem written by Du Fu to his good friend Yuan Danqiu, a hermit from Yuan Yi. The first few sentences describe the scenery of the altar with the images in Dongshan, Baopuzi, Immortal Biography and Records, praising people's practice. The last four sentences are said to be virtuous, ultra-worldly, food for immortals such as Lang, living in a fairy house with high iron locks and enjoying themselves.

From beginning to end, the whole poem revolves around the residence of Yuan Yi, a hermit, and the full text can be divided into three parts.

The first part: "Building a hut on a shady cliff alone". On the cliff of the meridian valley in Qinling Mountains, a thatched hut stands alone. This is the home of Yuan Yi, a master poet and hermit. It is characterized by loneliness and ugliness. Living alone, a cabin, a bowl of food and a ladle of drinks, the modality of hermit life is exposed.

The second part: Du Xuan altar scenery. The bluestone is loose and cold, Zigui cries at night, and the queen mother draws a cloud flag to turn over. It is far away from the world, although "bluestone is often cold, it is close to fairyland; Others sang the rules all night, which moved mangosteen to tears. During the day, a divine bird named the Queen Mother flew down from the clouds and reported the news to the celestial world. According to legend, Du Yu, the Emperor of Shu, retired to the Western Hills and became a cuckoo (Zigui), while the Queen Mother was the immortal believed by Taoism. This is the most wonderful shot, vivid, dynamic and static. The scene is full of emotions, which just reflects the hermit's sad mood and the embrace of escaping from the world.

The third part: knowing the grass is long, and the iron lock on the cliff is high. The tragic situation in Woods Valley did not change Yuan Yi's ambition of seclusion. He is aloof and aloof. Planting Cao zhilang during the day _ thought it was the food of the fairy family; The iron lock is a hundred feet high, and mortals will never dare to climb it. How relaxed and complacent you are in a blessed land! The hidden theme is obvious.

The three shots of the poem are integrated into one, and the style is sad and gloomy, without losing the poet's artistic style. Some people say that this poem "reposes the poet's admiration", and the author thinks that according to the whole poem and the last four sentences, "knowing a gentleman's plan is long, and wisdom and grass should be long." The poem "How blessed are you if you are locked in an iron lock?" The poet's behavior of seeking immortality through Yuan Yi people's channels is ostensibly praise, but in essence doubt. High-risk, cold, loneliness is true, mangosteen is cracked, the fairy sound transmitted by the mother bird is false, and the grass is empty. The unattainable is true, and the "blessed land" and "Xiao Shuang" are also false. Therefore, it is better to persuade him to come back early.