The principle of movable type printing can be said to be simple, even children in later generations can understand, but before the advent of movable type printing, few people can think of this method.

Later generations said that Bi Sheng invented movable type printing, but in fact, before Bi Sheng, there had been clay movable type, and Bi Sheng just changed the clay movable type to wooden movable type, of course, this is also a great improvement, so Bi Sheng, like Watt, although they are only improving the invention of their predecessors, but it does not hinder their greatness.

In the early Tang Dynasty, even the carved plate printing was still in a very primitive stage, only some temples in order to promote Buddhism, printed some scriptures or Buddha statues with carved plates, and then sold them to believers, but because the quality of the carved plates was inferior, the printed things were also very rough, so this printing method was not popular, except for a few Buddhist people, many people had never even heard of it, so Liu Renliang would be so excited when he knew the role of movable type printing.

"Horse, this movable type printing is great news for the world's readers, and I don't think one set is enough, why don't we make a few more!" After Liu Renliang was excited, he immediately proposed again, before he was against casting these copper movable type, because these things require a lot of craftsmen and copper, but now he took the initiative to build a few more sets, and this change is a bit too big.

"It's okay to build a few more sets, but didn't you say last time that there is not enough copper here in Luoyang?" Li Xiu asked with a smile at this time.

"Hehe, this ......" Liu Renliang heard Li Xiu's words, and also showed a very rare expression of embarrassment, and then said, "In fact, since the minting of gold and silver coins, the copper consumption of the minting bureaus in various places has been greatly reduced, and now the minting bureaus in various places also store some copper materials, and they can't be used for the time being, so I can be transferred to cast them into movable type!" ”

"Haha~, then do it, I want to take the freshly cast set to Chang'an to dedicate to Your Majesty, you let people put it in the box, and you stay here to supervise the casting of movable type, although this thing seems to be only able to print books, but in fact it has a deeper impact!" Li Xiu also laughed when he heard Liu Renliang's words, he is not a person who holds grudges, not to mention Liu Renliang's character, he also understands that he used the power of the Money Minting Bureau to cast movable type privately, which is indeed beyond the scope of the Minting Bureau's responsibilities, so Liu Renliang is so opposed.

"The subordinate obeys!" Liu Renliang immediately agreed, he vaguely felt that Li Xiu's purpose of casting movable type was not limited to printing books, but he was not in a high position, and these things were not something he should consider, for him, it was the most important thing to be able to cast the copper movable type more beautifully according to Li Xiu's requirements.

Then Li Xiu personally went to the warehouse to look at the copper movable type, speaking of which the coinage bureau was originally an asset with copper, and the mold of the copper coin also needs to be engraved, so the casting of copper movable type is not too difficult for those coppersmiths, and even compared to a small copper coin, the technical content of copper movable type is much lower, at least after Li Xiu checked it, he had to marvel at the craftsmanship of these craftsmen, no wonder Luoyang's coinage bureau can become the largest coinage bureau in Datang, and it is absolutely inseparable from the craftsmanship of the craftsmen here.

After checking the copper type, Li Xiu took a turn in the coinage bureau by the way, although he did not run here during this time, but the main energy was focused on supervising the casting of copper type, and he did not carefully watch the coinage process here, and he just took this opportunity to make up for it today.

However, just after Li Xiu had just finished visiting the Minting Bureau, he was about to go back to rest, so he rushed to Chang'an as soon as possible the next morning, but he didn't expect to suddenly meet a person at the door of the Minting Bureau, and when he saw this person, he couldn't help but be stunned, and then shouted tentatively: "Wang Fan? ”

Hearing Li Xiu's voice, the young man holding a pile of paperwork in front of him also immediately turned his head, but when he saw Li Xiu, he was startled at first, and then immediately walked over with a smile and saluted: "I've seen my brother!" ”

This young man is the son of the county lord of Guanghua, that is, Yang Fan's widow, but he has always grown up with his adoptive parents, and the county lord of Guanghua is also worried that after recognizing this son, the identity of the prince of the previous dynasty will make Yang Fan's life change dramatically, so he has been living with his adoptive parents in Luoyang, and even simply followed his adoptive father's surname Wang, but Wang Fan will go to Chang'an every year to visit the county lord of Guanghua and Ma Ye, Li Xiu also likes this young man, plus both of them are half of Ma Ye's sons, As a result, a few years ago, Ma Ye forced them to form brothers with different surnames.

"No need to be polite, why are you here?" Li Xiu couldn't help but ask again in surprise at this time, when he saw Wang Fan just now, he was still a little unsure, but he didn't expect it to be the other party.

"Hehe, I don't know what my brother-in-law knows, I went to the Luozhou Governor's Mansion last year to do things, and today I have official business to come to the Minting Bureau to deal with it, so I ran in person, but I didn't expect to meet my brother-in-law here, I don't know when my brother-in-law came to Luoyang?" Wang Fan also explained with a smile that he didn't know the news of Li Xiu's presence in Luoyang, after all, Li Xiu came back in a hurry this time, and after coming to Luoyang, he often ran outside the city, and he didn't have time to inform him.

"I see, but how did you come up with the idea of doing things in the Governor's Mansion?" Li Xiu first nodded when he heard this, and then asked curiously, after all, Wang Fan's identity is a little special, and Wang Fan now knows his origin, he is not short of money now, and the county lord of Guanghua and Ma Ye bought him a lot of land in Luoyang, which is enough for their family's life.

"Didn't I get married last year, but my father said that since I got married, I also need to start a business, and I don't look like a man when I stay at home every day, so I asked me to come out and find something to do, so as not to become a wasted person, but it just happened that the governor's mansion needed people, and I could write and calculate, so I went in and became a little official, and it wouldn't be so boring to do something." Wang Fan explained with a smile again.

Li Xiu finally understood when he heard this, Wang Fan's adoptive father was a small businessman, even if he didn't need to sell tofu to support his family now, he didn't want his son to be a rice worm, so he urged him to come out and do things, it didn't matter if he made money or not, anyway, their family didn't lack that money.

Although Li Xiu and Wang Fan became righteous brothers, they were forced by Ma Ye after all, and the two usually did not have much contact, so after learning about Wang Fan's recent situation, Li Xiu also encouraged a few words, and told him that if he encountered any difficulties, he could come directly to himself, and then he said goodbye to the other party and left, and the next morning, he rushed to Chang'an with the cast copper movable type.