In fact, the four-wheel carriage is not complicated. The key lies in the steering mechanism.

The steering mechanism is not difficult, but a layer of window paper. Once it is broken, it will no longer be mysterious.

The front axle of a four-wheel carriage is connected with the chassis through a rotating pivot so that the front wheels can turn in the right direction.

The front wheel of the carriage is smaller than the rear wheel. The front wheel is responsible for steering and the rear wheel is load-bearing.

Because it is four wheels, the load capacity of its own vehicle will be higher than two wheels, there is no doubt.

As for the shock-absorbing and shock-absorbing springs of later carriages, Li forgot to worry about them. Anyway, they are carriages used to pull goods, and there is no need to consider the problem of comfort.

The reason why he knew the structure of the carriage was not surprising. When he was a child, there was a cooperative carriage in the village.

The favorite thing for several bear children is to take a carriage, and the carriage has been broken several times. Every time when it is repaired, Li forgets to worry and looks at it. As soon as he comes and goes, he can figure out what's going on with the carriage.

Carpenter Liu and his three sons have really good skills. In addition, they happen to help people build ox carts at home, and the wheels are ready-made.

He took his three sons and spent an hour working out a set of steering devices for carriages with wood. He found the chassis of the ox cart and installed it.

Not long after, the first four-wheel carriage of the simple version of the Tang Dynasty was built. It looked strange because it was temporarily modified with the chassis and wheels of the ox cart.

The old village was turning around the "four-wheel carriage" for several times. He looked incredulous: "Xiao Lang, this is what you said. A carriage that can pull thirty stones? Don't make trouble. It's impossible."

Li forgot to worry and said with a smile, "just try."

They pushed the extremely simple four-wheel carriage back to Li forgetful's house, which attracted many people in the village.

"What kind of car is this? It's strange. Why do you have four wheels?"

"How can these four wheels work?"

"Maybe it's something new made by Xiao Lang of the Li family. Just have a look."

The four-wheel carriage was pushed to the door of Li Qieyou's house. Li Qieyou didn't care about his two horses. Even the two horses rode by Yang Zui and his entourage were brought over and put on by Carpenter Liu.

Then he asked the Niu brothers to help carry grain. The family stored more than 300 stones of grain and asked them to move out 30 stones for experiments.

These grains are packed in gunny bags. One bag is a stone. The villagers who watched the excitement in the village also came to help, and soon built a full 30 stones of grain on the carriage, which towered and piled into a hill.

This makes the villagers who are watching the excitement make bursts of comments.

"What is Li Xiaolang doing? He doesn't want to pull the carriage with these four horses, does he?"

"It's impossible. You can't pull the thirty stone grain with four Qianniu!"

"Isn't it? Who has ever seen horses pull so many things? Besides, the car is strange. It has four wheels. Tut Tut, it's really strange."

"I bet the horse won't move. It's almost the same when the gods appear."

Yang Zui and Lao Murakami also didn't believe it. Even if they saw the drawing of the carriage painted by Li forgetful, they also watched carpenter Liu's father and son build the carriage, but they didn't think that the four horses could drag so much food.

Li forgot to worry and pulled Niu Wu: "Erlang, will you catch the bus?"

"Yes."

"Then sit up and drive the carriage." Li forgets worry and pushes Niu Wu into the carriage.

Niu Wu looked strange: "Lang Jun, really? I'm afraid it's not going to kill these four horses? I can't bear it."

Li Heng, the old housekeeper on one side, was even more distressed. He couldn't afford to let the two horses in his family pull the cart, not to mention the grain of thirty stones.

Li Heng looked at Li forgetful with a cry in his eyes. Li forgetful only didn't see it, but urged Niu Wu to get into the carriage quickly.

Niu Wu had no choice but to climb into the carriage. The four wheeled carriage made temporarily is basically a chassis with four wheels, and there is nothing else.

He could only fart - sit on the sack containing grain, grabbed the reins with both hands, and turned to look at Li forgetful.

"Lang Jun, am I really in a hurry?"

"Yes, yes, hurry up! What are you doing dawdling about?" Li forgetful urged again.

Niu Wu was helpless. He shook the reins and made a "driving" sound in his mouth to drive the horses.

In the surprised eyes of all the people, they saw that the four horses' necks hung down and their four feet worked hard, and the carriage miraculously began to move slowly!

"Move! Move! The carriage really moved!"

"My God, four horses can really drag thirty stones of grain? Son of a bitch, did I not wake up?"

"Li, Li Xiaolang, I'm afraid it's really an immortal? Is this an immortal method for the carriage?"

"Come on, this carriage is really running!"

Niu Wu drove a carriage full of grain and trotted down the village road. All the villagers who were watching cheered up to see why the carriage was so magical.

"Lang Jun, how does this car turn?" Niu Wu suddenly shouted in the carriage.

"Like an ordinary carriage, there is no difference."

Niu Wu drove his carriage through the village, turned around under the elm at the entrance of the village and ran back again.

"Lang Jun, this carriage is so divine! It can really drag thirty stone grain, and it is no different from an ordinary two wheel carriage. Oh, no, it should be better. It's easier to turn just now than a two wheel carriage."

Niu Wule stopped the carriage, jumped down from the carriage excitedly and shouted.

Yang Zuan and Lao Cun Zheng were stunned by this scene.

"The Ming government, do we have to serve the corvee in spring for 20 days? What if we finish the grain transportation task ahead of time?" Li forgot to worry. Seeing the success of the four-wheel carriage, he suddenly remembered something and hurriedly pulled Yang Zuo and asked.

"Of course not. Your corvee is to transport grain, and the corvee will be completed when the grain is transported." Yang Zuan replied carelessly, and his eyes did not leave the four-wheel carriage for a moment.

At the next moment, Yang Zuo grabbed Li forgetful's arm excitedly: "Ziyou, can you really make such an artifact? If my Tang Dynasty were all such carriages, do you know how important it could play? Quickly give the carriage drawings to the county, and the county will play the court!"

Li forgot to worry and turned his eyes powerlessly. NIMA, if he has something good, he wants to take it away. Can he have a face?

Why do Tang officials have such virtues?

"Mingfu, I can't give you the drawings of the four wheeled carriage."

"Why is this?" Yang Zuo wondered.

Li forgot to worry and smiled: "wait until we finish the corvee in spring."

Yang Zuan was stunned. When he thought of his question just now, he suddenly understood. Pointing to Li forgetful worry, he smiled and said, "Ziyou, you! All right, this county understands, so this county will wait more time."

Li's words made Yang Zuo immediately understand what he wanted to do.

However, he was not prepared to oppose the so-called coming rather than going. Since Li Shi used such shameless means first, Li forgets to worry about a small counterattack.