Brief analysis: These two poems vividly describe the vitality of spring and the spring feeling of generate from the deep sleep in autumn and winter. Yingying is a singer who sings the beautiful spring scenery in the south of the Yangtze River. Yan is a migratory bird. It comes from the north in spring. They are full of seasonal sensitivity and become a symbol of spring. Here, the poet's choice of things around him is typical. The "early" of "early warbler" and the "new" of "new swallow" are interactive in meaning, and they are connected into a complete picture. Because it is an "early warbler", I rushed to the warm sunny tree to try its ticking sound; Because it is a "new swallow", when pecking mud and holding grass, it will arouse people's first pleasure when building a nest.