What's the matter in lesson 27 of Chinese book in Volume 2 of grade 4 of primary school

What's the matter in lesson 27 of Chinese book in Volume 2 of grade 4 of primary school

The text mainly talks about the scene of a deaf mute youth painting fish in Yuquan on Sunday, which shows that only careful observation can make the painting vivid, and praises the deaf mute youth's excellent character of conscientiousness, perseverance and diligence