The poet saw the beautiful spring sceneries of "Liu Yiyi on the Pond" and "Butterflies falling with the flowers, and swallows flying in the water". He happily pointed them out to his friends one by one, but only responded. There were a few sparse shouts of praise. This huge contrast awakened the poet from his intoxication with the beautiful scenery. The poet suddenly realized that some of his friends had passed away, and the number of friends around him became less and less year by year. A feeling of loneliness could not help but hit his heart. The word "surprise" perfectly expresses the poet's huge psychological contrast.