Old man Ji rubbed it on the shell of the red lotus with a rag, wiped off a shallow layer of black ash, twisted it with his fingers, and sniffed it in front of his nose.

This black powder and debris are bonded to the shell and section of the red lotus, and are pinched hard with fingernails.

"What is this?"

Old man Ji turned his head, was stunned for a moment, and stepped forward to raise his foot to kick someone.

"The immortal board of your house told you to take refuge! Tell you to evacuate! ”

Shang Lu raised his hand in surrender, and then let him avoid these two feet, and then put on the white hard hat, "The giant machine has entered the port, according to the regulations of the Drill Office, I am here to inspect the workshop, Teacher Ji, I will do things according to the rules and regulations." ”

Old man Ji snorted with his nose, "Little turtle grandson." ”

Shang Lu stood on the working surface, his eyes swept over the shocking huge wound on the left shoulder of the red lotus, the shoulder, hip, knee and ankle are the main load-bearing joints, the main structure here is the thick high-strength alloy skeleton and hydraulic system, the super giant forging, very strong, but the shoulder joint is smoothly and easily cut, through the opening of the shell you can see the complex internal mechanism, gears, joints, crankshafts are cut, the high-strength titanium alloy looks no different from the cream, the power of the lighthouse angel is staggering.

What caught Shang Lu's attention was the condensation of dots of black powder on the section, not only metal forgings, but also the outer armor made of composite materials with these powder and debris of unknown origin, large swaths of them, as if splashed with a layer of light ink. Old man Ji handed the rag in his hand to Shang Lu, who also twisted it with his hand and frowned.

"Do you have a key?" Old man Ji asked, "You want iron." ”

Shang Lu touched his pocket and took out a bunch of keys, Old Man Ji took it and pressed the keys on the rag, and when he lifted it again, he found that these black crumbs had been sucked up.

"Magnetic iron oxide." Old man Ji said, "The source of ferric tetroxide is definitely not the red lotus itself, it doesn't have so much iron on it. ”

"The source is the Lighthouse Angel?" Shang Lu asked.

"Oh, we misjudged that thing." Old man Ji smashed his mouth, "That red line is not a high-energy laser, nor is it a high-temperature jet, fine baby, you said that Sazi things will produce iron?" ”

Shang Lu was stunned.

"Iron ...... Iron ore? ”

"Nuclear fusion." Suddenly, someone said, "Stars produce iron." ”

Old man Ji and Shang Lu turned their heads and saw Shen Jiang leaning against the elevator of the work platform, she didn't know when she came up, she was leaning on the railing to take care of her wet hair, the girl's eyes swept over Old Man Ji's dirty white coat and the hard hat on Shang Lu's head, slightly surprised, and those beautiful and sharp eyes suddenly became confused.

"Superintendent?"

Shang Lu was more surprised than her, and even more confused than her.

I didn't know myself when I met you in the hallway, so why did you suddenly recognize yourself?

"I haven't seen you for a few days, don't come unharmed."

He said hello decently.

Shen Jiang nodded at him, walked straight over, and said: "We have a big problem with the prediction of the lighthouse angel, the red line is not shot out of it, on the contrary, the red line is the body of the lighthouse angel, its interior is not a photon, so it is not a high-energy laser, nor is it a gas, so it is not a high-temperature jet, the internal structure of the red line should be a very dense celestial body, which is undergoing thermonuclear fusion at an extremely fast speed." ”

"Nuclear...... Nuclear fusion? Shang Lu asked.

"That's right." Shen Jiang nodded, "From our frame of reference, the essence of the lighthouse angel is a star that is more than ten kilometers long and probably no more than one micron in thickness. ”

"Are you sure?" Old man Ji asked.

"Intuition." "When I was closest, the red line was only 10 meters away from me, and I felt like I was looking at the sun. ”

Old man Ji thought for a moment and nodded, "Your intuition is generally accurate. ”

Shang Lu was already stunned.

Although he is a student of engineering, not theory, but after studying physics for so many years, Shang Lu can hardly imagine that stars will exist in such a way.

How strange is the gravitational pull of a star with a length of more than 10 kilometers and a thickness of no more than 1 micron in such a strange shape?

This problem will not be solved until much later, and Shen Jiang later tells him that since all long-range forces in four-dimensional space no longer follow the inverse square ratio, but the inverse square ratio, the attenuation of the force is much higher than that of three-dimensional space, which will make it difficult for all objects in four-dimensional space to maintain a large configuration, and gravity will no longer be the main factor determining the shape of celestial bodies—and because of their mass, their projection in three-dimensional space will be affected by the curvature of three-dimensional space, so they will often become strange.

Humans in three-dimensional space will never know the measure of angels, which are four-dimensional objects, that is, volumes, but it can be predicted through theory that the nature of four-dimensional spaces limits them to form larger forms.

So we can know that all the heavens are very small in size, maybe only a few millimeters in diameter, a few micrometers in diameter, or even a few nanometers in diameter, and if we could put the angels in our universe in their entirety, they would be as small as grains of sand, dust, and even molecules and even atoms, and human beings would be giants in front of them that would be difficult to look up to.

It is a pity that angels are high-dimensional objects, and their projections in three-dimensional space are often huge, large and thin, long and thin, because the measure itself is unchanged, the larger the expansion, the thinner its thickness, and the longer it is stretched, the smaller its thickness, in a mathematical sense, every angel is a piece of paper with negligible thickness.

- Shen Jiang taught Shang Lu so much.

Then she died.

"092 is still approaching, we don't have time to delay, we have to make a second interception tonight...... What are you looking at? Shen Jiang was stunned.

Shang Lu didn't speak, and silently took out a tissue from his pocket and handed it over.

"My day." As soon as Shen Jiang touched it, she knew that there was another nosebleed, she took the tissue, wiped it and wiped it and bleed, so she had to plug her nostrils with paper.

"Red Lotus's state still needs to be evaluated, and it may not be able to be dispatched again." Old man Ji was a little worried, "The most terrible thing is that there are only two rounds of ammunition left. ”

"Two shots are enough." Shen Jiang ordered in a hurry, "Let's go and have a meeting with the Joint Finger Center, and finalize the second interception plan as soon as possible, and we can't let 092 get five kilometers close to the defense line!" The 110 workshop here will speed up the progress to restore the red lotus, the red lotus can't recover, everyone has to be finished, call back the people who went out to take refuge, I am you, you are all burning your buttocks and taking refuge, avoid your uncle. ”

The girl kicked the railing hard.

Shang Lu knew she was having a headache.

"My day—"

Shin Jiang bent down and hugged his leg.

Shang Lu knew that not only did she have a headache, but now she also had a leg pain.