This poem came from the Tang Dynasty poet Wang Zhihuan's "Climbing the Stork Tower." The whole poem is as follows: The white sun is leaning against the mountains, and the Yellow River flows into the sea current. I want to see a thousand miles and climb another level. The wind and rain in the pavilion at night, the rooster crows, the mountain is clearer. When a gentleman on the beam entered my door, the moon was in the tower. This poem described the magnificent scenery and the feelings of the author after he climbed the tower. The phrase "A gentleman on the beam enters my door" expressed the poet's welcome and blessing to the arrival of a friend or partner.