Zhao Chuanglai's contemptuous face turned pale in an instant. Ling Fen picked the city wall in the most stable part. It is impossible for ordinary people to penetrate the long halberd. Zhao Cheng couldn't figure out how to use two long halberds to destroy a wall.

"Has the Mohist family advanced to this level?" Ziying sighed inwardly. There are indeed a few points in the structure of the house that can destroy the whole house by touching a little, but this was how the Mohist people discovered it a thousand years ago.

"Have you received the approval of the King of Qin now?" Ling Fen said with a smile, and the guard soldiers beside him slowly stayed away from Ling Fen.

Ziying recovered from his senses, stepped forward tightly, pushed away the guards in front of him, bent down and bowed to Ling Fen, "Boy Ying Ziying, please give me advice!"

With Lingfen's skills, if you want to kill him, you don't have to choose time. Just the exquisite mechanism of the Mohist school can be regarded as a guest of honor wherever you go.

Now that Lingfen can actually come back on his own initiative, Ziying doesn't know what Lingfen is thinking, but she must not neglect it.

Ling Fen smiled and helped Ziying up, "The King of Qin cannot afford such a great politeness, I cannot afford it."

"Sir, you can bear it." Ziying said with a decisive tone.

Ling Fen's eyes were filled with the care of the elders for the younger generation, "Since that's the case, then the King of Qin is my disciple."

"I... I will be appointed as the Grand Tutor tomorrow." I was used to calling me, and Ziying almost didn't change it.

"It would be great if the King of Qin has this intention. The Mo family is simple and doesn't care about any official position." Ling Fen refused.

Ziying smiled and said, "That disciple also learns from Xiang Yu and calls you "Asia Father."

"The King of Qin is so polite, just call him a master."

"Die boy, my face changed quite quickly." Ziying and Ling Fen had a happy conversation. Caiwei was secretly jealous in her heart. She was originally Ling Fen's only disciple, but now Ziying is here to grab the position.

Caiwei was not sure if Ziying was the descendant of the Lü family, so Zhao Cheng, who killed Gai Nie, stood beside him.

A thought formed in Caiwei's mind, and Ling Burn became Ziying's teacher. Will Ziying listen to him everywhere in the future?

It seems...this is an opportunity for revenge in the future.

Caiwei's eyes gradually became sharp.

After a joke, Ziying took Lingfen into the carriage together.

"The First Emperor uses mountains and rivers as the city defense and has never refined the Xianyang city wall. I am the first one." Ling Fen sighed.

Ziying felt a little embarrassed, "Master, this time it's not a repair, but a reconstruction."

What the Qin Dynasty lost was not only the country but also the hearts of the people. Except for the Qin people, everyone in the world hated the Qin Dynasty to the core.

Ziying needs to have a stable nest in Chongshan Pass so that she can have the opportunity to defend Liu Xiang's attack and have the opportunity to counterattack.

"Reconstruction is OK, but Liu Bang is outside the Ship Pass. I don't know when it will be too hasty." Ling Fen was uneasy, "Didn't the King of Qin want to launch hundreds of thousands of soldiers like the First Emperor?"

"Master, don't worry, absolutely not, I will give them money." Ziying quickly explained that he would not dare to do anything that was unwilling to the people.

Ling Fen nodded thoughtfully.

The carriage came to the bedroom slowly, and Ziying and Lingfen sat down against each other.

"All matters tomorrow will be for you, Master." Ziying said respectfully.

"When will the King of Qin complete the work at the latest?" Ling Fen asked.

The city walls of the Qin Dynasty were made of solid soil, and at most some stones were built outside. Lingfen was a giant in the Mo family. If Ziying really had a lot of manpower, Lingfen would choose the best method for him based on time.

"It's tomorrow." Ziying replied.

"Is the King of Qin serious?" Ling Fen was confused. Even the simplest compaction of soil cannot be completed in one day. It must take many days to compact. If the soil is not solid, the brutal supervisor will directly build the person in charge of that section of the city wall.

This Qin King Master is really not something that ordinary people can be.

Ziying also knew that this task was too difficult, but he had the best way in his mind, and he didn't know whether Ling Fen could understand it.

Although the Qin Dynasty had already had iron smelting technology, it was not mature at all, and that method might not work at all.

"If you really can't do it, then the sooner the master's wishes, the better." Ziying sighed, "I will go to Guguan in person tomorrow to buy enough time for the master."

Liu Bang and his friends would follow the old method to bribe the soldiers guarding the city first, let them relax their vigilance and attack the city while they were unprepared.

If Ziying went to take charge personally, the soldiers would definitely not be careless. With the terrain of Zhiguan, Liu Bang and others would never be able to attack.

"The King of Qin doesn't have to sigh. Tomorrow, I will crush the rocks on the surrounding mountains into foam, add clay and water, and put them into wooden models. This method only takes one day to form, but unfortunately it takes about 10 days to water it before it can be used formally." Ling Fen said, this was the most solid way he could think of.

"Okay, then..."

Ziying was stunned. He had heard of this method, not in the Qin Dynasty, but in the modern era.

Isn't this what he thinks of concrete?

Ling Fen actually understands this!

Ziying was both shocked and excited, "Master, you haven't thought about adding iron tools to the model? That will make the city wall stronger."

Ling Fen thought slightly and shook his head, "The iron tool is hard and easy to break. When the iron tool breaks, the city wall will be destroyed. You should use steel with excellent toughness!"

"steel....."

Ziying was stunned and had nothing to say. This giant was a bit magical. When the iron smelting was underdeveloped, Lingfen could actually understand what steel was.

There were indeed many things in ancient times that did not seem to belong to this era. The bronze sword of King Goujian of Yue was immortal for thousands of years, and no second one could be made in the era discovered.

However, the impact Lingfen brought to Ziying was too great. Could it be that Lingfen also traveled through time?

Ziying decided to give it a try.

"Oh, it's really inconvenient to have no electricity, otherwise you won't have to light the oil lamp with your master at night." Ziying finished speaking casually, staring at Ling Fen's reaction.

Ling Fen frowned tightly, extremely puzzled, "Is the King of Qin talking about the thunder and lightning in the sky? If you expect the light of the thunder and lightning in the rainy night, you would be better than an oil lamp."

Ziying breathed a sigh of relief. It seemed that Lingfen was just a giant in the Mo family.

Suddenly, Lingfen fell into deep thought, "According to the essence of the Book of Changes, the sky and the earth are interconnected, and perhaps there are things similar to thunder and lightning under the sky, and I may really find them."

"Master, let's talk about the city wall of Ri." Ziying hurriedly stopped Ling Fen's Si Lai. If Ling Fen really went to study electricity, no one would have built the city wall.
Chapter completed!