This is a separate volume. The "Strategies of the Warring States" is very thick. The printed version is a single book and it's extremely expensive. Some scholars who can't afford it would buy these hand-copied separate volumes. Each one costs about a hundred to two hundred pennies. Students like Zhou Lixue would get ink and paper from here and copy them. They can earn around twenty pennies per volume, and if they make fewer mistakes, they can even save some money on ink and paper.
They don't earn much, but they are currently studying "Strategies of the Warring States". Copying such books not only helps with their memorization but also allows them to earn some pocket money. It's a very pleasant thing.
The premise is that they haven't seen how their little aunt bargains with the owner over the cost and selling price of a book.
Including Bai Shuping, all three of them felt a bit disheartened, so much so that they didn't want to speak. After taking the new sheets of paper, they left.
