Who is the rhubarb in the legend of Hulan River?

Rhubarb in Hulan River is rhubarb dog.

Xiao Hong likes to chat with rhubarb dog in Hulan River Biography. When he is with people, he seldom talks and talks strangely. Who is this man?

In the sixth chapter of Hulan River Biography, the author focuses on the character You. In addition, the author also has an essay "People Outside the Home", which is also about two uncles. Xiaohong's family has a second uncle, a long-term worker. This character who lives like a joke makes people want to cry.