Write the poem "Meeting the Messenger of Beijing" into a short essay.

It has been many days since I left Chang 'an. Looking back, I only feel that the road is long and Xiu Yuan is full of dust. I don't know how many days I walked, but on my way to the western regions, he suddenly met an old acquaintance. I immediately talked about each other and exchanged cold feelings. Knowing that the other party was going back to Beijing to report on his work, I suddenly thought of asking him to send a letter back to his hometown in Chang 'an.