Sorry, I stepped on your foot. What poem is it?

Sorry, I stepped on your foot. Now is the eighth episode. The TV series Old Pub is a chronological drama directed by Liu Jiang, written by Chen, Amanda, Sang Ni, Cheng Yu and others. The play tells the story of Chen Huai Hai, the owner of a small shop named Shandong Old Tavern in Dalian during the Republic of China. In the eighth episode, He Tang Yi confessed to the old man that he had no money at the beginning, so he took the house as collateral, so there really was a deed, and he found someone to fake it. He was directly angered by Tang Yi. The two brothers Chen Huaihai were drinking in the old pub, and when they were about to close, the second one braved the heavy rain and came to the old pub, asking Chen Huaihai why he had to close early. Chen Huaihai explained that there were no guests in the rain, and Erliang pointed out that even if there were no guests, don't close the door early. What are the rules? Chen Huaihai listened to the lesson of the second child modestly, and then asked where the second child was. The second child said that he was in the old ravine, and everyone was shocked, but it was ten miles away from here. The second child only said that he had a head to look forward to, and he was not afraid. Chen Huaihai felt very sad and unbearable, so he suggested not leaving Liang tonight, staying in the old pub and finding a car to send him back tomorrow. The last two agreed to go back at eleven o'clock, and we can't violate the rules.