What Mr. Wen Yiduo said and did. What kind of visual descriptions are interspersed in the narrative of this article? Talk about the role of these descriptions.

There are many specific descriptions of Wen Yiduo’s language and portrait in the text. For example, bright eyes, messy hair, head held high, and long beard. There are also detailed descriptions, such as "one large square bamboo paper book after another, filled with densely packed small regular script, like a swarm of ants arranging the Yamen." All these can play a role in concretely reproducing the respectable and tall image of Mr. Wen Yiduo, making his spirit, character and style seem to be something that can be concretely perceived.