The first paragraph (section 1): Describe the appearance and characteristics of the swallow, and describe the lively and cute appearance of the swallow.
The second paragraph (section 2): It writes about the swallows flying from the south, adding vitality to spring.
The third paragraph (section 3): Describe the lightness and flexibility of swallows in flight.
The fourth paragraph (section 4): Describe the lightness and dexterity of the swallow when it rests.
Central idea
This text depicts lively and lovely swallows, praises the vibrant spring, and reflects the author's joyful mood