This was the plot of a transmigration novel. The male protagonist and his roommate traveled through time together. The male protagonist was a king, but he did not know where his roommate was. Therefore, the first half of the couplet was written," The swallows return to the dance floor and still hope that their roommates can return to the original dance venue to dance together." However, his roommate did not reply according to the meaning of the first half of the couplet. Instead, he replied with a sentence: "The king is buried in the spring, and the mud is melted into bones. I am sent to the world, and the snow is all over my head." The meaning of this sentence is that your bones buried in the ground have rotted, but my heart in the human world still carries the thoughts of you. This sentence expressed the deep feelings between the male protagonist and his roommate, but also hinted at the difficulties and challenges they were about to face.