From the perspective of "people can live, sows can climb trees", it means that sows can't climb trees in a meeting. Just as ancient men and women wrote to show the loyalty of love: I want to know you, and I want to live a long life. There are no graves in the mountains and rivers, thunder in winter and rain and snow in summer, but I dare to be with you! It means the same thing! They all set off what they said before with impossibility.