As Bai Fan silently received, a ball of light flew out of the system space again, and then quickly submerged into his body through Bai Fan's eyebrows, and then he fell into a coma.

The first-level gift package used to be unforgettable, the second-level gift package was used to read books to learn craft skills, and the third-level gift package was the same source of the hundred veins and ten thousand laws, so as to facilitate the martial arts to have a smooth road.

Now that the fourth-level library is industrial civilization, then the gift package must also be something that will help you learn industrial civilization.

Sure enough, this time this light group did not transform Bai Fan's whole body, but all converged on Bai Fan's eyes, there was no stimulation or discomfort, Bai Fan felt that his eyes were as comfortable as soaking in warm milk.

Three days later, Bai Fan opened the door and went out of the customs, which was very bad for the two ladies who were waiting anxiously outside, the two knew that their husbands were in retreat, and they all wanted to guard the customs and protect the Dharma, but the whole day passed, there was no movement, no eating, drinking and no talking, Li Wanping and Dou Qiongying did not dare to bother, they could only continue to guard, they really couldn't, the two took turns on duty, and now Bai Fan finally came out of the customs, and the two of them put their minds at ease.

When he opened the door, Bai Fan did not look sluggish or tired, but was full of energy, especially those eyes, bright, very bright, in the past, he said that he had eyes like a star, but now he really looks like a star, as long as he opens his eyes, others will be attracted by his eyes when they see it.

"Husband, you, your eyes are ......," Li Wanping exclaimed.

Bai Fan took her hand and said with a smile, "There is a small breakthrough, there is another opportunity in your eyes, your body temperature has dropped a little, it seems that you have been extremely lacking in rest in the past two days, and the energy in your body is insufficient, so you have worked hard." ”

"Huh? It doesn't matter, it is the duty of the concubine to help her husband protect the law, Sister Ying'er and the two of us take turns to guard, and she just went back to rest.

Fujun's medical skills are getting more and more powerful, and he doesn't need to check the pulse, he knows everything when he pulls his hand. ”

"I'm here to look, my eyes can see your body temperature, your pulse, and your body size......"

Bai Fan gushed endlessly, and immediately said that his wife's face turned red, and with a scolding, Li Wanping pulled him to see Dou Qiongying, whether his lover has a breakthrough is not the point, as long as he can get out of the customs smoothly and come out safely.

In fact, Bai Fan didn't lie to his wife, this is his chance, the fourth-level gift package is simply powerful, the name is - the eye of subtlety, or Bai Fan prefers to call it 'the eye of the ruler', in order to make Bai Fan more effective in spreading the knowledge of industrial civilization, the gift package transformed his eyes, although he can't see through the origin of things, but as long as it is within the reach of the naked eye, he can see its size, temperature, force, and pressure of everything...... and so on.

This is more accurate than the real external manual measurement, because this is the slightest moment, which can be the eye of the scale for the world.

With this pair of eyes, whether it is manufacturing measurement or smelting metal temperature measurement, there is no need for instruments, as long as Bai Fan can see it, it is accurate and convenient, safe and convenient, and may not be of much use in the future, but it is very necessary in the early stage of industrial rise, and with this pair of eyes, the success rate will be greatly improved.

After a day of rest, Bai Fan left the dean's courtyard and came to the academy's architectural research room, where he found Li Chun, the first architect of the Tang Dynasty!

It is the person who built the Zhaozhou Bridge, before finding him to join the academy, and let the disciple Li Chengxun also worship under his disciples, humbly learn bridge construction technology, in recent years Li Chun has built small bridges around Chang'an, or sometimes according to the classics to learn the method of attacking large bridges, but everything is difficult at the beginning, and now due to the problem of building materials, it is not too big a bridge, it is said that Li Chun's dream is to build a giant bridge on the Yellow River.

And his apprentice Li Chengxun's dream is to build bridges all over the Shu Mountains, so that bridges can replace the dangerous plank roads, so that the people of Shu are no longer on the death line.

"Lao Li, don't be busy with your architectural drawings yet, I have great news to tell you here." Before entering the door, Bai Fan shouted at Li Chun in the house.

With Bai Fan's current skills, he can sense what the other party is doing in the house without entering the door, and he can't escape his perception within thirty meters.

"White boy? Don't bother me, the Jinghe Bridge repair project will start soon, and I will have to proofread it again. Li Chun didn't raise his head, and waved his hand to drive away.

"Jinghe Bridge? That small bridge of tens of meters? What is the value of repair? Datang now has a lot of money, can't he just build a new one? Bai Fan was puzzled.

"The new bridge has been built, and the restoration of the old bridge is a question for the students, which is the meaning of the old bridge not being demolished, and we will talk about it when I finish proofreading."

Bai Fan nodded and praised, such an ingenious method, I'm afraid only this master can think of it, who is not in a hurry to dismantle it in a hurry?

However, although Bai Fan praised, he did not stop his intention, stepped forward and snatched a pile of drawings in front of Li Chun, and said seriously: "The good news for me here is that I can make new building materials, which are not stone or wood, easy to transport and use, and strong compared to stubborn stones, gold and iron. ”

"Really ???" Li Chun exclaimed, then grabbed Bai Fan's shoulder and asked.

"It's true!"

"So what are you waiting for? Let's go! Take me to see, what new material? Li Chun urged.

"What about the blueprints of the Jinghe Bridge?"

"Demolished, demolished...... All the disciples followed me to study the kilometer bridge, a broken bridge of tens of meters, there is no value in repairing. ”

…… Bai Fan was speechless, and some wanted to take back the previous praise.

Bai Fan took Li Chun and soon came to Yuan Tiangang's Taoist temple, and asked him to ask him for a group of Taoist people who were proficient in alchemy, of course, this group of people had stopped alchemy, and they all followed Bai Fan.

This new material is actually the world's first building material - cement!

"Jane, is this thing really so amazing? Weekdays like soil, add water to turn into stone? How does this feel like the legendary finger into steel? Li Chun couldn't believe it.

Bai Fan explained: "It's not so magical, this thing is taken from the stone, the basic principle is to use fire to calcine the stone, burn the stone into ashes, easy to transport, and then we use water to reconcile, it is equivalent to extinguishing the fire to get stones."

It's just that the internal reaction is extremely complex, these are what the Daomen needs to study and consider, you just need to understand the performance hardness of this thing, and help taste the advantages and disadvantages. ”

"That's right, my favorite is drawings and mechanics, these strange symbols and the like, the old man is old, he can't do it, my apprentice training may have the patience to learn this." Li Chun said modestly.

…… Bai Fan discussed, what do you mean that you are old, you old guy can eat three roast chickens a day, verify 200 drawings for three days without sleep, it can be said that he is the most energetic old man except for the medicine king Sun Simiao, and now he is so modest.

It took two days for Bai Fan and everyone to build a kiln mouth for firing cement by local method, and a group of people were disgraced, all around the kiln mouth and staring at the situation inside.

(End of chapter)