Daming: I Became the Richest Man by Writing Summaries

Travel through time and become a small official in the Ming Dynasty. He has no backing or background, and relies on his ability to write summaries by hand. Others write to deal with errands, but he writes about favors, chips, and knives. From county government documents to cabinet drafts, every word is worth a thousand dollars, and every step is taken care of. What they fight for in the court is power, and what he fights for is the pen to write. When everyone thought he was a pen holder, he had already bought half of the Ming Dynasty's business with ink. You start with a pen and end up rich - the key is that every word you write is a price.