After a busy day's work, Xu Yifan drove a car and ran towards home.

Because he is too busy, he does not have time to go to Jingnan City, the provincial capital, for the time being, he needs to complete the first phase of the factory and get the factory on the right track.

Since there are still people at home, Xu Yifan usually goes home at noon and leaves until 4 o'clock in the afternoon.

Anyway, the factory is already functioning normally, he is the boss, just ask, it doesn't take a lot of effort.

Go to the vegetable market to buy some vegetables first, Tong Ling'e usually sleeps until the afternoon before getting up to play on the computer, and then goes back to get some delicious food.

was busy, and a call came to Xu Yifan's mobile phone.

Xu Yifan picked it up and took a look, it turned out to be Tong Deen, an old man.

"Hey, Tong Lao!"

"Yifan, when are you coming to Jingnan City!" asked Tong Lao straight to the point.

Xu Yifan was stunned and said with a smile: "It is estimated that it will take a while, I have been a little busy recently!"

"Still busy raising money?"

"Yes, the twin-tailed scorpion drone needs financing, the factory still needs to be built, it is very busy, and it is estimated that it will not be able to go in a short time!" Xu Yifan said with a smile.

Tong Lao thought for a while and said, "We still hope that 587 can come as soon as possible! You kid, you are a little deep, and no one on our side can understand it!"

Xu Yifan said with a smile: "Where did I hide deeply? I don't know what you want!"

"How much do you know about mechanics?" asked Tong Deen.

"Mechanics?" Xu Yifan was surprised: "This...... I can't tell!"

"We see that the engine you modified is amazing and very fuel-efficient! This engine is extraordinary, don't you plan to use it?" said Tong Deen.

"I plan to use it, but now I don't have the qualifications! It just so happens that I am planning to build an airplane! Tong Lao, can you apply for a qualification or something for me, maybe I can build an airplane!" Xu Yifan said with a smile.

"You kid...... If you want to make an airplane, come to our Jingnan Aerospace Research Center! We are the place where you make aircraft accessories!" Tong Deen smiled speechlessly.

"That's different!" Xu Yifan said with a smile.

"Your understanding of mechanics should be deeper than that of ordinary people, by the way, we are interested in the materials science you mastered!" Tong Deen smiled: "You kid is not simple, what else do you know?"

"(BCFA) This depends on what Tong Lao wants to ask!" Xu Yifan smiled modestly: "General materials are still very difficult to get, but carbon fiber, it should be easier!

"Yes, but a lot of machinery needs more precise parts! You can see that you know this very well!" Tong Deen smiled.

"In order to make money, I can't help but understand! I was too poor before!" Xu Yifan looked modest.

"Do you know anything about lithography machines?" asked Tong Deen suddenly.

"Lithography machine?" Xu Yifan was stunned.

"That's right! It's a lithography machine!" Tong Deen quickly said: "During this time, all kinds of news at home and abroad have been spreading, have you seen it? We have been blocked, and we need to solve this problem! You have a very deep knowledge of mechanics, so I want to ask you how much you know about this aspect?"

Xu Yifan was silent for a moment, and said with a smile: "This kind of thing is said to be difficult, it is a very terrifying precision instrument!"

"It's just that it's difficult to be troublesome! Our country's industry needs to develop, and we need this kind of machine! Now there is no good way to break through the blockade, so the state has given a large amount of investment, hoping to solve this problem!" Tong Deen smiled: "It doesn't matter if you don't understand, I'll just ask casually!"

"I can't answer this question now! I need to go back in the evening!" Xu Yifan thought for a while and said, "I'll find out if there's a good way!"

"That's okay!" Tong Deen didn't have any hope, and immediately nodded: "When are you coming to our side to report?

"It's estimated that it will be a month! Your granddaughter doesn't want to go home yet!" Xu Yifan said with a smile.

Tong Deen was happy: "She's having fun lately, right?"

"You have to ask her yourself!" Xu Yifan smiled: "I'll call you again when I'm free, I'm very busy now!"

"That's fine!"

Hanging up the phone, Xu Yifan thought about it and called in his mind. (If you read a violent novel, go to Feilu Novel Network!)

"Lithography machine!"

As soon as I saw a few swishing sounds, a lot of books immediately popped up in the industrial ball.

Xu Yifan looked at it roughly, and couldn't help but nod.

It seems that there is information in this area in the industrial ball, but Xu Yifan has not learned it for the time being, and he doesn't know how to use it yet.

I'll go back and take a good look at it later. []

He immediately carried something towards the house.

As soon as I got back to my house, I could already hear the sound of the TV.

Xu Yifan pushed open the door and walked in, and immediately saw Tong Ling'e lying on the sofa watching TV.

This girl, wearing shorts and shorts, showed her beautiful white legs that were as clear as jade, which was very attractive.

"You're back, play games with me!"

Xu Yifan glanced at her: "Aren't you hungry?

"Okay! get something to eat first!"

Xu Yifan nodded: "You lie down for a while! I'll get it!"

As he spoke, he went to the room for a while and got something to eat before bringing it out.

"Wow! beef noodles!"

When Tong Ling'e saw it, she immediately exclaimed, and quickly took it over and ate it.

"You're about to starve to death?" Xu Yifan said with a narrow smile.

"I'm so hungry, I'm hungry! Look at me, if you don't come back, I'll be hungry!" Tong Ling'e was taken aback, and then prickly puffed up her little stomach and said, "Now I finally have something to eat, of course I'm happy!"

"There are snacks in the room!"

"I don't want to eat snacks, eat bad teeth!" Tong Ling'e took another bite, and then smiled contentedly: "It's still delicious!

Xu Yifan couldn't help it.

accompanied her for a while, went to play games with her, and because Xu Yifan still had a job, he quickly came out and let her play by herself.

I look up the information about the industrial ball in my mind.

I don't know if I don't look at it, but at a glance, there is quite a lot of information about the lithography machine, and there are all aspects.

However, it is a pity that the manufacture of lithography machines requires a very high process, and ordinary things cannot be manufactured.

There is a saying that even if you get the drawings of ASML lithography machines, it is difficult for ordinary countries to manufacture them.

This is one of the highest technological crystallizations of mankind.

"The domestic industrial level has not yet reached such a level, and the technical requirements required are too high and too high!"

"There are still very few high-end processes in China, such as cutting-edge five-axis linkage machine tools, the gap is very large!

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