In the eighth year of Emperor Xuanzong of Tang's reign, in 749 AD, the thirty-four-year-old Cen Shan, because of his unsatisfactory career, accepted Gao Xianzhi's invitation and chose to go to the Western Regions to serve as the shogunate secretary of Gao Xianzhi, the envoy of the Anxi Festival. On the way out of the jam, Cen Shan met a deceased person who was going to return to Chang'an, so he asked the deceased to report peace to his family. Therefore, Cen Shan wrote a poem "Every Envoy entering Beijing", the original text is as follows:
The road to the east of the old garden is long, and the sleeves of the dragon bell do not dry up.
Immediately meet without paper and pencil, and report peace with the word of the king.

"The road east of the old garden is long", looking east to Chang'an only feels that the road is very far away. From Chang'an to the Protectorate of Anxi, the poet traveled all the way west. The hometown is gradually drifting away, but the weight in the poet's heart is getting heavier and heavier, and although the poet is rushing to the west, he frequently looks back to the east, hoping to look at Chang'an and soothe his homesickness. However, the poet's wish was disappointed, and all he could see was the long road when he came, and he could no longer see any trace of Chang'an.
"The tears of the two sleeves of the dragon bell do not dry", the tears of homesickness wet my sleeves, but the tears were still not dried. The poet is homesick but can't see his hometown, he can't go back to his hometown, he doesn't know the news of his family, and for a time, nostalgia is depressed in his heart and can't be solved. The poet was sad to the extreme, and the nostalgia turned into tears of homesickness, and unconsciously he burst into tears. The poet used the sleeve to wipe the tears, but the tears kept flowing, and even if the sleeves were wet, they still could not be dried.
"Meet at once without paper and pencil", we meet in a hurry on horseback without paper and pencil to write letters. On the way to the Western Regions, the poet met a deceased man who served as an emissary to Beijing. The poet went west, the old man went east, and both of them were on official business, and could only temporarily strangle the horse's head and talk hurriedly. This encounter was unexpected by the poet, and in a hurry, he could not find a pen and paper, and could not write a letter to his family for the deceased to bring back to Chang'an, and the poet's slightly improved mood had a twist and turn.
"To report peace by the word of the king", I can only ask you to carry a message and report peace to my family. After all, the poet is an open-minded person, and since he has no conditions to write letters to his family, please ask the deceased to carry a message to his family. The message is much shorter than the letter. At this time, the poet has a thousand words in his heart, but he condenses a thousand words into the word "peace". The poet thought to himself, let the family know the news of his peace, maybe they will not worry about themselves so much?
Speaking of which, the poet was an open-minded man who once said, "Merit should only be taken immediately." When he decided to get on the horse and take a meritorious name, the most important thing to let go of was his family, so the poet frequently looked back and secretly wept. The poet also understood that since he had embarked on a journey, he could not turn back, so when he said the word "peace", he rushed to the western region with the warmth of home in his heart.