Who is the new swallow pecking at the spring mud?

The whole poem is Bai Juyi's spring outing in Qiantang.

The full text is as follows:

From the north side of Gushan Temple to the west side of Jiating, the lake is just level with the embankment, with low clouds and waves on the lake.

Several early orioles raced to the sunny tree, and their new swallows were carrying mud in their nests.

Colorful spring flowers will gradually fascinate people's eyes, and shallow spring grass can barely cover the horseshoe.

I love the beauty on the east bank of the West Lake, and I can't get enough of it, especially the white sand embankment under the green poplar.

Nongshe Institute: Hu Yigu's hard-pen calligraphy work "Qiantang Spring Tour"

Translation:

Bypassing the north of Gushan Temple, strolling in the west of Jiagong Pavilion, the white clouds hang low at the beginning of the lake. Several warm trees that the oriole came out early competed for sunshine, and the new swallows were busy building nests and holding mud. Wild flowers will be dazzling when they are competing to open, and spring grass has just crossed the horseshoe before it grows tall. The beautiful scenery in the east of the favorite lake is unforgettable. Rows of willow trees pass through a white sand embankment.

Appreciate:

From the northern foot of Gushan Mountain to the present Pinghu and Bai Causeway Autumn Moon, the poet reported the information of spring to people all the way: the lake is full of spring water, the trees are full of spring warblers, Chun Yan is in the air, the spring flowers are blooming on the shore, and the spring grass is just green. The poet's keen and delicate brushwork makes people realize that the West Lake is wearing spring clothes in a stretch.

The poet praised the spring scenery of the West Lake and pointed out that he loved walking on the white sand embankment. There is water on both sides of Bai Causeway, and willows and peach trees are planted on both sides of the embankment. Walking on the Bai Causeway in spring, the lake is at your feet, and you seem to be walking on the water; Willow branches in early spring, like smoke and fog, like silk, come to your face and make your heart swell with infinite tenderness and infinite love. You are like in a dream and a fairyland. When you walk on the Bai Causeway in spring, you can better appreciate the poet's feelings and moods when he wrote this poem.