The palace maid on the side hurriedly said, "Princess Changle has played with the Rubik's Cube. ”

Li Shimin glanced around and didn't see Li Lizhen's back, "What about her?" ”

"Princess Changle went to Guozi to listen to Kong Yingda's lecture."

Li Shimin sat down again, holding the Rubik's cube that had been put together, and he was a little uncertain in his heart.

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

Kong Yingda said suspiciously: "How did Her Royal Highness the princess do it." ”

Li Lizhi said in a low voice: "Actually, it's not very difficult to find the law. ”

"Regularity? What a rule. ”

Li Lizhi said again: "The Rubik's Cube is full of wisdom, if it has been solved according to the law, wouldn't it lose its own meaning?" ”

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

Li Shimin has been sitting in the Lizheng Hall to review the recital, and when Li Lizhi came back, he asked, "Are you back?" ”

"Hmm." Li Lizhi nodded, sat on the side and obediently studied ink for Li Shimin.

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

"Li Zheng taught his daughter." Li Lizhen said aggrievedly: "Father, don't worry, my daughter didn't go to see Li Zheng on purpose, but just took the young slave to meet Li Zheng along the way." ”

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

Realizing that the atmosphere was not right, Empress Eldest Sun came with the brewed tea.

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

Knowing what his father meant, Li Lizhi picked up the Rubik's Cube and began to twist it, but the action was not very fast.

Li Shimin finished drinking a cup of tea, and Li Lizhi also restored the Rubik's Cube.

Li Lizhi explained: "Actually, there is a rule, Li Zheng said that there is a trick, and the children of Jingyang Academy can play." ”

"Those children from Jingyang Academy?" Li Shimin knew that Li was teaching some children to read, but they were all children in the village of Jingyang County, who were about 10 years old.

Li Lizhen nodded.

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

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

“……”

The Lizheng Hall was quiet for a while, and Li Shimin didn't pick up the Rubik's Cube, so he let out a long breath and said: "The court and the central government are arguing endlessly because of Feng An's affairs, and I don't know if the Zhongshu Province has a result." ”

Li Shimin stood up expressionlessly and walked out of the Lizheng Palace.

Ministry of Industry, Yan Liben has been specializing in Rubik's Cube and Huarong Dao these days.

Huarong Dao had been untied, and he was still turning the Rubik's Cube in his hand until the last twist, and the six sides of the Rubik's Cube were finally flattened together.

"I see." Yan Liben took the Rubik's Cube in his hand and looked excited.

It took more than half a month to finally unlock the Rubik's Cube and Huarong Dao, and Yan Liben was so moved that he wanted to cry.

When I opened the door, I realized that I hadn't been out for a long time.

Yan Liben feasted on a meal, sat down again and began to specialize in this Luban lock.

Twenty-four wooden strips are interlocking out of the Luban lock, which is very strong.

Looking at Lu Bansuo in front of him, Yan Liben's expression became anxious again.

The little official on the side said to Yan Liben: "Master Yan, rest for one night." ”

"No, you don't." Yan Liben looked at the Luban lock intently, "If the old man can't break Li Zheng's Luban lock, how can he be based on the Ministry of Industry, and how can he be a master craftsman in the court." ”

"But you haven't had a good night's rest." The little official said with a worried face: "You will burn your body like this." ”

Yan Liben poured a sip of strong tea to refresh himself, staring at the Luban lock in front of him, "The Rubik's Cube and Huarong Dao have been unlocked, and the old man doesn't believe that he can't unlock this Luban lock." ”

Jingyang

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

Holding this bow, Li Chengqian said curiously: "It's the first time I've seen such a strange-looking bow and crossbow. ”

"It's not actually a crossbow, it's a clothes rack." Lee is trying to quibble.

"Really?" Li Chengqian said: "Then why is there a quiver on the ground? ”

"It's just an ornament, it's useless." Li Zheng quibbled again.

Li Chengqian took out an arrow, "I have long known that you Li Zheng is familiar with all kinds of crafts, and even Yan Liben is full of praise for your craftsmanship." ”

After speaking, Li Chengqian had already taken the arrow, and said: "Lone has grown up with those generals in the army since he was a child, and unlike Qingque, Qingque prefers to be with civilian officials. ”

Li Chengqian aimed at a clay pot in the distance, and an arrow shot out, and the clay pot shattered in response.

"Huh? What a strange feeling. Li Chengqian recalled the feeling when he drew the bow, and took the arrow again.

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

Another arrow was fired, and the sound of the bowstring was crisp.

Hit the target very accurately.

"His Royal Highness the Prince's archery is really accurate, and I admire it."

Li Chengqian took out an arrow again and said suspiciously: "Li Zheng, your bow is strange. ”

"It's weird." Li Zheng shook the pu 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, His Royal Highness the Prince, don't look at this bow strangely, in fact, there is a lot of knowledge in it." ”

Li Chengqian drew his bow again, and this time he shot an arrow with all his strength.

The arrow swept straight over the horse ring and landed seven hundred paces away.

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

"That's nature, science is important to explore and verify, the use of mechanics can make the bowstring and bow body play the greatest effect, with the least force to shoot the farthest arrow, reduce vibration, increase stability and greatly improve the hit rate."

Li Zheng then explained: "In fact, most of the arrows shot by ordinary longbows are shaky, and the vibration of the bowstring body is combined with the arrows, and it often takes more force to hit the target. ”

"Lone knows that you have a way to accumulate wealth and know all kinds of work." Li Chengqian said with emotion: "Sure enough, if a person is too idle, he will do anything." ”

"It's actually quite busy, huh." Li Zheng nodded solemnly.

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

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

Li Chengqian retracted his eyes, "You said to let Feng Ang come to Chang'an, what should you do to invite you into the urn?" ”

"In fact, they themselves are not very peaceful in the Lingnan area, there are many Tujia guest villages, and there are Nanzhao and Zhenla on the border, in fact, Feng An's life is not easy."

Li Chengqian asked curiously: "You seem to know Lingnan very well." ”

：。 ：