The palace maid next to him quickly said, "Princess Changle has played with the Rubik's Cube."

Li Shimin glanced at Li Lizhi's back and didn't see her, "Where is her?"

"Princess Changle went to the Imperial College to monitor the old Master Kong Yingda's lecture."

Li Shimin sat down again and held the pieced together Rubik's Cube and felt a little confused.

In the Imperial College, Li Lizhi pieced together the six sides of the Rubik's Cube in front of Kong Yingda.

Kong Yingda said in confusion: "How did His Highness the Princess do it."

Li Lizhi whispered: "In fact, it is not difficult to find the rules."

"Rules? What rules."

Li Lizhi said again: "The Rubik's Cube is full of wisdom. If you keep solving it according to the rules, wouldn't it lose its meaning?"

Kong Yingda smiled and said, "The princess is right."

Li Shimin sat in the Lizheng Hall to review the memorials. When Li Lizhi came back, he asked, "Are you back?"

"Yes." Li Lizhi nodded and sat beside her and grinded ink for Li Shimin obediently.

Li Shimin put the Rubik's Cube on the table in front of Li Lizhi, "How did you do it?"

"Li Zheng has taught his daughter." Li Lizhi said aggrievedly again: "Don't worry, Father, my daughter didn't go to see Li Zheng on purpose, but just took Zhinu out for a walk."

Li Lizhi went out of the palace to meet Li Zheng, but Li Shimin was no longer surprised, but thinking that his daughter was facing Li Zheng everywhere, Li Shimin felt a little anxious.

Realizing that the atmosphere was not right, Empress Changsun came with the soaked tea.

Li Shimin disrupted the Rubik's Cube and placed it on the table.

Knowing what his father meant, Li Lizhi picked up the Rubik's Cube and started twisting it, and her movements were not very fast.

After Li Shimin drank a cup of tea, Li Lizhi also restored the Rubik's Cube.

Li Lizhi explained: "Actually, this is regular. Li Zheng said there are tricks, and the children of Jingyang Academy can play."

"Those children from Jingyang Academy?" Li Shimin knew that Li was teaching some children to study, but they were all those children aged ten in the village of Jingyang County.

Li Lizhi nodded.

Li Shimin smiled coldly, "It's just some children's toys."

Li Lizhi smiled knowingly, then broke the Rubik's Cube and put it in front of Li Shimin.

“…”

Li Zheng Hall was quiet for a while, but Li Shimin did not pick up the Rubik's Cube and breathed a sigh of relief and said, "The court has been clamoring about Feng Ang's affairs, and I don't know if there is any result in the Secretariat."

Li Shimin stood up expressionlessly and walked out of Lizheng Hall.

Ministry of Works and Yan Liben have been specializing in researching Rubik's Cube and Huarong Road these days.

Huarong Dao had been untied, and he was still turning the cube in his hand until the last twist, and the six sides of the cube were finally brought together.

"So that's how it is." Yan Liben looked excited with the Rubik's Cube in his hand.

After spending more than half a month, he finally unlocked the Rubik's Cube and Huarong Road. Yan Liben was so moved that he wanted to cry.

When I opened the door, I realized that I had not gone out for a long time.

Yan Liben had a meal and sat down again to study the Luban Lock.

The Luban locks that connect twenty-four wooden strips are very strong.

Looking at the Lu Ban Lock Yan Liben in front of him, his expression became anxious again.

The little official next to him said to Yan Liben: "Master Yan, please rest for one night."

"No." Yan Liben looked at Luban Lock attentively, "If I can't break Li Zheng's Luban Lock, how can I base myself on the Ministry of Works and how can I be a master in the court?"

"But you haven't had a good rest for several nights." The little official said with a worried look: "You will ruin your body like this."

Yan Liben took a sip of strong tea to refresh himself, staring at the Luban lock in front of him, "The Rubik's Cube and Huarong Road have been unlocked, but I don't believe it, but I can't unlock the Luban lock."

Jingyang

The composite bow hanging on the wall still did not escape Li Chengqian's magical eyes.

Holding the bow, Li Chengqian said curiously: "This is the first time Gu has seen a crossbow that looks so strange."

"This is actually not a crossbow, it is a kind of clothes rack." Li Zheng tried to quibble.

"Is that true?" Li Chengqian said: "Why is there a quiver on the ground?"

"This is actually a decoration, it's useless." Li Zheng argued again.

Li Chengqian took out an arrow, "I have known that you, Li Zheng, are well-versed in all kinds of craftsmanship, and even Yan Liben praised your craftsmanship."

After saying that, Li Chengqian had already taken an arrow and said, "Gou has grown up with the generals in the army since he was a child. Unlike Qingque, Qingque prefers to be with civil servants."

Li Chengqian aimed at a clay pot in the distance and shot it out with an arrow. The clay pot broke in response to the sound.

"Hmm? What a strange feeling." Li Chengqian recalled the feeling of pulling the bow and took the arrow up again.

This time, I aimed at a clay pot further away, which was about three hundred steps away from Li Chengqian.

Another arrow shot out, and the sound of the bowstring was very crisp.

Hit the target very accurately.

"Your Highness the Crown Prince's archery technique is really accurate, I admire it."

Li Chengqian took out an arrow again with an unfulfilled desire and said in confusion: "Li Zheng, your bow is strange."

"It looks weird." Li Zheng shook the palm fan in his hand and said: "In fact, the strange reason is caused by mechanics, which is also part of science."

"science?"

"That's right." Li Zheng looked at the scenery in the distance and said: "This kind of bow uses a kind of mechanics and physics in science. Your Highness the Prince doesn't look at this bow, but there are actually a lot of knowledge in it."

Li Chengqian pulled the bow again, and this time he tried his best to shoot out one arrow.

The arrow flew straight above the horse's ring and fell seven hundred steps away.

Li Chengqian held the compound bow in his hand and said, "Good bow!"

"That's nature. The key to science is to explore and verify. Using mechanics can enable the bowstring and the bow to exert the maximum effect, shoot the farthest arrow with the smallest force, reduce vibration and increase stability, and greatly improve hit rate."

Li Zheng continued to explain: "In fact, most of the arrows shot from ordinary longbows are shaking, and the vibration of the bowstring body is connected to the arrow. If you need to hit the target, you often need to put in greater strength."

"I know that you have the best way to make money and know all kinds of craftsmanship." Li Chengqian sighed: "Sure enough, if a person is too idle, he will do anything."

"Actually, I'm quite busy, um." Li Zheng nodded seriously.

"You're just busy making money and counting money."

Li Zheng touched his nose calmly, "We just talked about Lingnan."

Li Chengqian retracted his eyes, "You said you should let Feng Ang come to Chang'an, what should I do if you ask you to get into the trap?"

"In fact, they are not peaceful in the Lingnan area. Tujia villages are numerous, and there are Nanzhao and Zhenla on the border. In fact, Feng Ang's life is not easy."
Chapter completed!