Once upon a time, it was difficult to make it difficult for the sea to be underwater. A joke about one sentence

There was a newlywed couple. On the night of the bridal chamber, the bride said to Sina: "I have a first couplet. Please correct a second couplet. If you are right, you will sleep with me tonight. If you are not right, you will sleep with me tonight." Standing outside the door, when did you go into the house to sleep? "The bridegroom said: "Please tell me." The bride said: "Listen, my first line is: It's difficult to change the sea." After that, he entered the house and held the door. Off. The groom thought for a long time and couldn't figure it out. He walked around the door feeling helpless. It's almost midnight. The groom's sister passed by and saw her brother still standing at the door. She smiled and said, "Brother, a spring night is worth a thousand gold. It's so late, and you are still standing guard for your sister-in-law." The groom said embarrassedly: "The bright moon is better tonight. , I'm admiring the moon." My sister said, "I'm afraid my brother has encountered some difficulty. If you tell me, I might be able to help you." After the groom said this, the sister said, "That's it, that's okay." Not simple, these are the first two sentences of a poem written by Yuan Zhen, a poet of the Tang Dynasty, in memory of his wife. The full text is: Once upon a time, the sea was difficult to deal with, except for Wushan, it was not a cloud. I looked back lazily at the flowers, half destined to practice Taoism and half destined to be a king. It's about the love between husband and wife. She said that once the sea was full of water, all you need to do is get rid of Wushan and it's not clouds." The groom was very happy and said loudly: "I'm in love. , the door opened, the bride welcomed the groom into the house, the two hugged each other and went to bed, they were so loving.