The Bookish Scholar of the Red Mansion

The protagonists of the imperial examination essays in Red Mansions are children from peasant families, who tend to live in daily life.
It focuses on the protagonist's self-struggle and saves Sister Lin through a curve.

PS: The protagonist is not a distant relative of the Jia family, and has nothing to do with Jia Shi Wang Xue. Although it is called Red Mansion, it is just a character borrowed from Red Mansion, and it appears late. Please note before reading.