According to Lin Danhong's instructions, Qiao Mingshan set up an offensive and defensive system on the track where objects falling from the top of the vortex neck move towards the vortex cavity. Since the discovery of several drones that were smashed beyond recognition, no UFOs or flying saucers have been found.

Drones come in.

But recently, a lot of things happened that puzzled him, that is, many of his drones were inexplicably knocked down, but he couldn't find any aircraft attacking his drones.

"Several of our interceptor drones were shot down, but we found the aircraft that shot down our drones." Qiao Mingshan had to report it to Lin Danhong immediately.

"I guess Jiang Tiancheng is playing a new trick again. He may have entered the vortex cavity. We are facing a serious threat." Lin Danhong was surprised.

"Then what should we do?" Qiao Mingshan felt deeply uneasy after hearing this.

"I immediately asked Mr. Qiu and Mr. Su to help us think of some ways to deal with Jiang Tiancheng." Lin Danhong had no choice but to contact Qiu Siyuan and Su Shan through the signal converter above the vortex eye.

"You first connect your drone groups by monitoring each other, so that once Jiang Tiancheng's men attack your drone, they will be photographed by the drones photographing each other, and then look for the attack in slow motion.

Your drone aircraft." Su Shan ordered Lin Danhong.

"I'm trying to find a way to send a drone into the vortex cavity to help you fight Jiang Tiancheng's drone," Qiu Siyuan said.

"The drone may not be able to enter." Lin Danhong said hurriedly.

"Why?" Qiu Siyuan asked puzzledly.

"Not long ago, we discovered the wreckage of multiple drones. It is estimated that Jiang Tiancheng tried to send drones in to attack us before, but they were scattered by the centrifugal force of the vortex neck."

"Really." Qiu Siyuan asked thoughtfully: "Then how come your drone can get in and out so easily?"

"Our drones and spaceships are different from the drones and flying saucers of your Kuipers. They have reverse anti-rotation devices. I don't understand the specific technical principles, and they won't tell you."

"Strange." Qiu Siyuan asked in confusion: "How did Jiang Tiancheng and the others get in without a trace?"

"Well." Su Shan smiled: "Didn't I tell Lin Danhong that Jiang Tiancheng's tricks will be exposed through drone photography. Then we will learn their methods."

"Oh." Qiu Siyuan also smiled: "You still have a way."

Lin Danhong immediately followed Susan's instructions and put all the drones into a mode of monitoring each other and sending messages to each other, waiting for her drones to be attacked again.

In the past, she was worried that her drone would be attacked, but now Lin Danhong was looking forward to Jiang Tiancheng attacking her drone again.

Of course, Jiang Tiancheng didn't know it was a trick. Two days later, he secretly ate Lin Danhong's two drones again. He did this in order to make a small fuss and not attract Lin Danhong's attention, so that Lin Danhong could not find her.

The reason is kept in the dark.

Nezeng thought that Lin Danhong actually used the characteristic of transmitting information axially from the vortex cavity through the internal energy of the vortex to contact Qiu Siyuan and Su Shan outside the vortex to ask for advice.

As a result, Jiang Tiancheng shot down Lin Danhong's drone, and the surrounding drones captured the moment he shot down two drones.

This information was transferred by Lin Danhong to the monitors of Qiu Siyuan and Su Shan through the signal conversion station above the vortex eye.

When they watched it in slow motion, they were all stunned: Jiang Tiancheng actually entered the vortex cavity in such a stupid way.

It turns out that there is no cutting-edge technology at all, but just an iron egg. Whose idea was this?

Of course, what Qiu Siyuan and Su Shan never expected was that the person who proposed such a stupid method was a famous space expert in Kuiper's world. His surname was Yu, but his name was unknown. Jiang Tiancheng only called him Master Yu.

Through slow motion, Qiu Siyuan and Su Shan clearly saw that these steel balls, also known as iron eggs, were painted black on the surface. Due to the influence of the high-speed rotation in the vortex neck, the painted shell had worn away and turned into a mirror.

It's shiny. However, when you look closely, you can see residual traces of paint in some places.

"Okay." Su Shan smiled: "Although we can't think of the cutting-edge technology that allows humans in the world to freely enter and exit the vortex eye, the stupid method Jiang Tiancheng and the others came up with also works. We also went in and talked with

They toss about it together for a while."

In this way, Susan immediately developed and produced a large number of steel ball-type offensive and defensive detectors through her colleagues in the Engineering Department of the Kuiper Space Exploration Branch. Soon they were launched into the vortex eye from above.

Because it was shot in at a relatively high speed, Jiang Tiancheng and the others had no time to observe, let alone block, and a large number of steel balls entered the eye of the vortex.

In order to prevent these steel ball attack and defense devices from being confused with Jiang Tiancheng's steel ball attack and defense devices, Susan asked the Engineering Department of the Inner Space Exploration Bureau to specially make them exactly the same in appearance as Jiang Tiancheng's steel ball attack and defense devices, but with an automatic discrimination function added inside.

Your own offensive and defensive devices will never accidentally hit your own offensive and defensive devices.

In this way, when the steel ball offensive and defensive equipment of both sides are mixed together, he can still distinguish his own. Jiang Tiancheng was unlucky because they might not have considered this.

Su Shan promptly informed Lin Danhong about sending a large number of attack and defense devices into the vortex cavity to attack Jiang Tiancheng's steel ball attack and defense devices. She also informed Lin Danhong of the control codes of these steel ball attack and defense devices.

Four days later, these steel ball attack and defense devices successfully entered the vortex cavity through the slender vortex neck. Lin Danhong immediately controlled these attack and defense devices through the password and began to search for and destroy Jiang Tiancheng's steel ball attack and defense devices.

Jiang Tiancheng originally planned to drop a batch of large self-exploding steel ball bombs into the vortex eye to destroy the space city in the prison world, dealing a devastating blow to Lin Danhong and the prisoners of the prison world.

Unexpectedly, he suddenly received news from Lu Hechang that many steel ball detectors had lost contact with attack and defense devices, and he couldn't help but be shocked.

He felt that he had encountered another serious setback. Even such a small steel ball detector was found and destroyed by Lin Danhong and others. How about putting in a larger self-exploding steel ball bomb?

Self-exploding steel ball bombs are designed to destroy the space city in the prison world. The original plan was to use steel ball attack and defense devices to clean up Lin Danhong and his drones and then put them into the vortex eye to carry out the destruction of humanity in the prison world.

Who would have expected that when Moldon Jackson was asking his old colleagues at the production site to catch up on the production, he would receive such unfavorable news. Not to mention Jiang Tiancheng was dumbfounded, even Molton Jackson also stamped his feet and lamented.

Because these steel ball attack and defense devices specially made by the Engineering Office of the Inner Space Exploration Bureau of Su Shanrang are equipped with no-light and shadow detectors, and the outer shell coating of Jiang Tiancheng's steel ball detector is polished by the rotation of the vortex neck, it is easy to reflect light and is easier to detect.

It was discovered by the no-light and shadow detector, so the detectors and attack and defense devices placed in the vortex cavity were quickly discovered and cleared by Lin Danhong's steel ball detector.

Jiang Tiancheng gave up the idea of ​​putting large high-explosive bombs into the vortex eye to destroy the world-contained space city. Although Morton Jackson was very dissatisfied with this, what could he do?

Jiang Tiancheng's Mr. Yu is a well-known space expert. His words are the conclusion: if you don't use offensive and defensive equipment to clear Lin Danhong's drone first, there is no hope of inserting large steel ball high-explosive bombs. Because once it enters

.As soon as you enter, you will be destroyed by the drone that has been waiting in the vortex cavity for a long time. It is meaningless to destroy as many as you release.
Chapter completed!