布谷鸟创作了一首取曲《欢乐的春天》，在“森林之春”晚会上负唱，观众报以热烈的掌声，称赞它是“多年来少见的一首歌”。人无完人，全无足赤，歌曲自然也不例外。为了把这首歌曲信攻得更加完美，老鹰请领导们给布谷鸟提“宝贵意见”。公鸡第一个站起来说：“这首歌写得很有 Cuckoo wrote a song entitled “Happy Spring”, singing at the “Spring of Forest” party, and the audience applauded warmly and praised it as “a rare song for many years.” No one is perfect, all red, songs are no exception. In order to make the song more perfect letter attack, the eagle asked leaders to give cuckoo “valuable advice.” The first cock stood up and said: "This song is very well written