Pieces of iron are forged. Then, the iron pieces are constantly beaten and continue to forge together.

Iron cages, about one meter long and one meter wide, were made like this. These iron cages were strong and durable. When building city walls, the iron cages were filled with stones and could be used to build walls.

The problem is, how to transport these iron cages to the city wall is the biggest problem. Because each iron cage is extremely sunk to prevent the bombardment of cannons.

Zhu Cilang asked Cao Bianjiao to take people outside the city to log wood. From a big tree as thick as a bowl to the giant trees surrounded by two people, they were transported to the city one by one. Compared to carrying stones, it was much easier to transport the giant trees.

The giant tree was transported to the city, and Zhu Cilang ordered everyone to dismember the wood. He wanted to make a huge winch and use the principle of leverage to make a tower crane.

More than a dozen carpenters were discussing the drawings drawn by Zhu Cixuan. If they couldn't understand the parts, they would ask Zhu Cixuan to ask.

Zhu Cilang patiently taught them little by little. Soon, after the carpenters understood the principle of the tower crane, they all opened their eyes wide in fear and were amazed.

"The Creation of Things in Heaven" was first published by Ming Dynasty scientist Song Yingxing in Dingchou in the tenth year of Chongzhen. It has a total of three volumes and eighteen chapters. The book contains production technologies such as agriculture, handicrafts, such as machinery, bricks, ceramics, sulfur, candles, paper, weapons, gunpowder, textiles, dyeing, salt making, coal mining, oil pressing and other production technologies.

"The Creation of Things in Heaven" is the world's first comprehensive work on agriculture and handicraft production. It is a comprehensive scientific and technological work in ancient China. Some people also call it an encyclopedia-style work.

Many carpenters regard natural craftsmanship as a treasure, but it is far from the crane drawing hand-painted by the crown prince.

The tower crane made by Zhu Cixuan uses the principle of the winch. Only seven or eight people need to rotate the winch hard, and then use the lever counterweight principle to easily transport the iron cage and stones to the city wall. Just build a wooden tower crane with giant trees to easily solve all this.

Not only the bandits incorporated by Zhu Cilang, but even the Ming soldiers under Li Shouyan and Cao Bianjiao are now provoking their crown prince.

Zhu Cilang has become a god-like existence in Yizhou City.

The huge winch tower crane was completed bit by bit in the hands of carpenters. The exquisite craftsmanship of these carpenters also made Zhu Cilang admire him.

Let’s talk about this territory. The wooden territory uses a bracket structure. The carpenters did not use a single iron nail. The brackets they made with linked mortise and tenon structures are an outstanding work of art.

What’s important is that the wooden bracket is strong and durable, and the tower crane is rising little by little. The nearly 10,000 people brought by Zhu Cixuan started construction day and night. About seven or eight days later, the tower crane was finally completed.

This is a movable tower crane, but moving it requires at least a hundred people to work together. The collapsed city wall was cleared out again, and the sturdy and durable iron cages were lifted out by everyone.

Zhu Cilang did it intentionally, so he deliberately asked Li Shouyan and Yuan Xiaoxiao to transport the stones together. Outside the Yizhou City, stones within a radius of several miles were transported to the city.

The soldiers lifted or resisted the stones and put them into the iron cage together. The iron cage, one zhang long and one zhang wide, had four corners tied with hemp ropes. Under Zhu Cixuan's command, the pulleys of the wooden tower crane rolled gently, and the ropes as thick as their arms slowly hang down. The craftsmen fixed the ropes to the iron cage, and the people under the tower crane turned the winch.

Everyone held their breath, and in people's expectations and shocks, as the winch continued to rotate, the iron cage weighing several tons was slowly lifted.

The crowd cheered, it really happened!

This method is really useful. The huge winch doesn't take much effort to lift the iron cage. The raised iron cage slowly rises, and then the people below turn the tower crane together, and the iron cage falls steadily on the city wall. Then the people on the city wall untied the rope.

A burst of cheers broke out in the crowd again: "Your Highness, the Crown Prince, Thousand Years, Thousand Years, Thousand Years!"

Using this method, it only takes half a day to repair the walls of the South City. Cao Bianjiao and Li Shouyan, who have experienced many battles, looked at each other and couldn't help but take a breath. Oh my God, I couldn't believe that the project volume of one or two years could be completely completed in one month by this little prince.

As the iron cages were piled up on the city wall one by one, the entire city wall was repaired bit by bit. Then, the soldiers on the city wall tied ropes around their waists, and they held a wooden barrel around their waists.

The wooden barrel was mixed with mud with rice bran. These soldiers were like spiders on the city wall, placing the mud in the wooden barrel on the outer wall of the iron cage. In this way, to outsiders, the iron cage would be integrated with the city wall.

Moreover, the iron cage wrapped in mud can prevent the iron cage from being corroded. This massive project has become simple and effective in Zhu Cixuan's hands.

On the eighth day of the second month, sunny. The southern city of Yizhou City was completely restored. The iron cage wall was full of stones. Even if it was bombarded with red cannons, you would never be able to bombard them.

After all, he was worried. As the governor of Ji Liao, Hong Chengchou was like an ant on a hot pan these days, and he was restless. Yizhou is located at the forefront. Once Jiannu came to attack and there was no city defense there, the crown prince would die.

If the crown prince is killed or captured, he will be the governor. What's so bad is that judging from the actions of Jiannu, Huang Taiji seems to be preparing for the southward journey.

This made Hong Chengchou feel even more anxious. He decided to go to Yizhou in person to take a look. If he could persuade him, he would try his best to persuade the crown prince. If he really couldn't persuade him, he would have to tie him back even if he was beaten and tied up.

Hong Chengchou personally ordered two hundred soldiers and horses, left Songshan and rushed towards Yizhou.

In Beijing, Emperor Chongzhen was also a little restless. For some reason, he felt inexplicably panic: "Hey, come with me to bring me a pair of towels."

Wang Chengen bowed and went there. Soon, a palace maid walked in with a hot water basin. Wang Chengen soaked the towel in hot water, then wrung it out and handed it to Chongzhen.

Emperor Chongzhen applied a hot towel to his right eyelid: "The left eye twitches and the right eye twitches and disasters. My right eye has been twitching all the time these days, so why don't there be any disaster."

"Long live the dragon body, the Lord will be the one who will protect me from the Ming Dynasty." Wang Chengen said a comforting word that he didn't even believe.

In recent years, there have been countless disasters that the Ming Dynasty has encountered. It can be said that there will be no peace for a day.

Chongzhen was a little tired, he was really tired. He lay on the soft collapse in the Yangxin Hall, putting a hot towel on his face, and then he slowly fell asleep.

Wang Chengen signaled the palace people in the hall to retreat quietly to avoid disturbing the emperor's rest. Chongzhen was too tired and needed a good night's sleep.
Chapter completed!