Princess Changle didn't know what Su Cheng was doing, but she knew why she was busy. However, she didn't expect that Su Cheng would even reject the order to summon his father for this.

Was she and Wu Xi so attractive to Su Cheng? So much so that Su Cheng didn't even care about entering the palace to discuss matters?

The eunuch next to him hurriedly said, "Qi Empress, I don't know this servant. I only know that after hearing the eunuch's report, His Majesty took Lord Fang, Lord Changsun, Lord Wei and others to hurry out of the palace!"

Empress Changsun became more and more curious when she heard this, and looked at Changle and asked, "Changle, what is Su Cheng busy with?"

Princess Changle's face turned red and she shook her head repeatedly and said, "I don't know this daughter."

"Why are your face so red? Are you uncomfortable?" Queen Changsun asked with concern.

Princess Changle shook her head repeatedly and said, "No, no, mother, I'm fine."

Facing the mother's concerned and puzzled look, Princess Changle had an idea and hurriedly said, "Although I don't know what the husband is busy with, I must have something important to be busy before I can't enter the palace to discuss matters. Could it be that the father is going to trouble my husband, right?"

It turned out that he was worried that Su Cheng would be beaten. Empress Changsun smiled and said, "Your Majesty really wanted to beat Su Cheng, and he would also ask the guards to take him to the palace. How could he go out of the palace to find Su Cheng in person? And he also brought Fang Xuanling, Wuji, Wei Zheng and other important officials."

Princess Changle nodded after hearing this, "What the Queen Mother said is, then I'll feel relieved."

Empress Changsun smiled and said, "It must be Su Cheng who is trying to make something good. Your father can't wait to leave the palace after he knows it. He just doesn't know what Su Cheng is trying to make."

At the end, Empress Changsun looked curious, because Su Cheng was definitely extraordinary every time he made an action, so it was even more exciting.

Princess Changle smiled and said, "I'm also curious. Yesterday, when talking about the great success of literature, I also thanked Mr. Langjun, but Mr. said that it's very simple to do something that has been famous in history. I will do another one in the next few days."

Do another thing that has been famous in history? Although I had already guessed it in my heart, Queen Changsun was still shocked and asked quickly: "What's the matter?"

"I don't know, I went out early this morning, it's mysterious." Princess Changle pouted slightly, actually she was very curious.

Once a person's curiosity is aroused, he thinks that a seed will fall into his heart and will sprout and grow vigorously.

Li Shimin walked into Lizheng Hall with great strides and found that the queen and daughter were looking at him. Li Shimin asked with some confusion: "Why are you looking at me like this?"

Empress Changsun smiled and said, "I heard that Your Majesty suddenly left the palace? Why did you tell me?"

Li Shimin was happy to hear this and said, "I originally wanted to summon Su Cheng to the palace to discuss matters, but this guy said he had no time to enter the palace and was improving printing techniques in the printing workshop. I took Fang Xuanling, Wei Zheng and the others to take a look."

"Improved printing technology?" Empress Changsun was slightly stunned when she heard this.

Li Shimin said excitedly: "Yes, improve printing technology! Nowadays, printing books are printed using woodblocks. Every time you print a book, you have to carve it out in its original form, which is time-consuming and laborious."

"Su Cheng's idea was to use movable type printing, carve a pair of movable type, and then rearrange and combine the movable type no matter what book it prints."

Empress Changsun couldn't help but lit up her eyes and suddenly said in surprise: "Yes, this is too simple. Carving a single word and then combining it at will. How easy it is! Why didn't anyone think of it before? I have to say that Su Cheng is so smart!"

Li Shimin waved his hand and said, "How can it be that simple? The carving is made of wood carving. If you can't use wood carving, it will deform and rot in the near future if it is soaked in ink."

"Some of those craftsmen thought about printing books with movable type before, but they couldn't solve this problem."

Empress Changsun and Princess Changle were a little disappointed after hearing this. They thought Su Cheng had created movable type printing, but it turned out that woodcut could not be used.

Empress Changsun, who was a little disappointed, suddenly realized that Su Cheng must have solved this problem, otherwise how could the emperor be so happy?

"I guess Su Cheng must have solved this problem, right?" Queen Changsun asked in surprise.

Li Shimin nodded and said, "I don't know what this kid thought of it, but he actually came up with it! First, he used copper plates as a mold, burned lead into lead water and poured it into the mold. After cooling, he got the lead type after a little polishing. He could really print the characters."

Empress Changsun's eyes became brighter and brighter, and she said in surprise: "Lead type is not easy to be damaged and can be used for a long time. And it has copper plate molds. It is very simple to make another set of lead type!"

Li Shimin smiled and nodded and said, "Yes, that's the reason. With this lead type, printing books will be much more convenient and quicker. In the future, there will be more books on the market, and the prices of books will be much lower. Poor scholars can also buy books!"

Empress Changsun sighed: "With scholars, all scholars in the world are very lucky! They should really thank Su Cheng!"

Li Shimin laughed and said, "Of course, today Wei Zheng, Kong Yingda, and Chu Suiliang bowed to Su Cheng on the spot, saying that the scholars in the world thanked Su Cheng."

"Su Cheng really deserves this! Not only scholars of the times should thank Su Cheng, but scholars of the future generations should also thank Su Cheng!" Empress Changsun smiled and looked proud.

Li Shimin said happily: "First, there was great success in literature, and then there was movable type printing. Our Tang Dynasty not only had great martial arts but also had brilliant literary governance!"

Princess Changle's pretty face was already red. Yesterday, Su Cheng bet that she would definitely do something that would be famous in history within five days. She originally thought it was unlikely, but because Su Cheng looked very confident, she was a little skeptical.

But he never thought that Su Cheng had movable type printing the next day.

Of course, Princess Changle knew the significance of movable type printing, and it would definitely be famous in history, so she and Wu Yu had already lost this bet.

Although she lost the bet, she was not depressed at all, but was very happy.

Originally, she wanted to give Su Cheng some motivation.

While she was happy, she felt very shy. Su Cheng won too quickly and she was not ready yet.

"What makes me most moved is that Su Cheng did not intend to make money with movable type printing, but instead announced movable type printing to the public." Li Shimin sighed.

Empress Changsun couldn't help but sigh: "The great master is selfless and has the world in mind. Su Cheng is such a good child!"

Li Shimin smiled and said, "If it weren't for this, I would have beaten his butt long ago!"
Chapter completed!