"Take a look yourself."
Then, a book was thrown at her.
Ye Muyu did not mind. After all, they were in someone else's territory, so they had to lower their heads. Besides, it was not a big deal.
She, who had always been calm, quickly opened the book and read it.
She was a little suspicious. She only saw one kind of extremely expensive Oil Smoke Ink. The others were basically Pine Smoke Ink, and the price of Pine Smoke Ink was not cheap.
This was not surprising. After all, the raw material needed for Pine Smoke Ink was pine trees. The ancient people did not have the idea of planting trees. Over the years, Pine Smoke Ink naturally became more and more expensive.
It was located in Jiangnan, and the economy was prosperous, but it could not withstand the price of Pine Smoke Ink. She remembered that the Song Dynasty had begun to develop all kinds of Oil Smoke Ink.
