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Li Ping'an told his daughter-in-law what he heard today.

"Lady, I have been writing for a few years, and today I heard Mr. Shi talk about the book, and I thought of a way to spread it, and I will find a bookstore to copy and sell it in a few days."

Daqian already has a printing method, but the cost is high, and hand-copied books are still the mainstream at present.

What is lacking in printing is not only technology, but also because of the family's boycott, conceptual imprisonment, and the book industry, so that it has not been popular for a long time

"I am immortal in history" Chapter 7 Taizu Xinggong is in the middle of the hand, please wait a while,

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