D-level males reached the pinnacle of life by living off women.

The prevailing view in the empire is that rank is predetermined and there is no possibility of advancement through birth.

Of course, this viewpoint did not come out of thin air, but is the result of multiple studies and verifications.

The Imperial Academy of Sciences also tried to find a way to upgrade the Imperial Zerg level, and even secretly conducted experiments on many female Zerg, but all of them ended in failure.

After several attempts failed to yield any results, the Imperial Academy of Sciences finally announced that ranks were predetermined and there was no possibility of advancing through them.

However, although the conclusion was announced to the public, many researchers have not given up on this research.

When Song Mo, a male insect that suddenly differentiated into an S-class insect, appeared, many researchers were excited, thinking that the research on level improvement could finally make a breakthrough. Even the Imperial Academy of Sciences couldn't help but join the research on Song Mo.

However, after carefully learning about Song Mo's situation, the result was very disappointing to everyone.

After everyone's research, it was determined that the reason why Song Mo was in this condition was because Song Mo had suffered a severe blow when he was still an insect egg, which resulted in his weak body after birth.

It was this physical weakness that affected Song Mo's level test results, causing the machine to fail to accurately determine Song Mo's true level.

In other words, there is no such thing as acquired differentiation. Song Mo was actually S-rank from the start, it just wasn't detected before.

After that, the entire empire basically believed that levels could not be increased later in life.

Therefore, Feynman did not believe a word of Rhine's claim that he had become an S-class.

Rhein didn't say anything in response to Feynman's questioning, but instead suddenly revealed his two pairs of wings.

Upon seeing the two pairs of wings, Feynman was completely stunned. Everyone knows that two pairs of wings are the mark of an S-class female insect.

No matter how much you say, nothing is more convincing than the objective evidence right in front of you.

After regaining his senses, Feynman immediately looked at Rhine with the eyes of someone looking at a rare treasure.

"Rhine, what happened to you? How did you suddenly become an S-rank?" Feynman asked.

"I don't know, I don't understand what happened to me."

In fact, Rhein had a suspicion that Lu Yuan might be involved in the advancement.

After all, the source of a female insect's power is her spiritual sea, and her level is closely related to her spiritual sea.

Since he got together with Lu Yuan, Lu Yuan would give him mental comfort whenever conditions allowed, which kept his mental state in good condition.

Furthermore, after the functions of the silver crystal were later developed, Rhine wore a lot of silver crystal ornaments, and there was not a single crack in his mental sea.

Rhine reasonably suspected that his advancement was related to his consistently good mental state.

However, given the distance involved, Rhine habitually kept it a secret.

Feynman rubbed his hands together like a fly, and said impatiently, "Rhine, can I do a physical exam for you?"

Good heavens, this is the body data of the first female insect in the empire to naturally advance. Feynman felt that the empire's highest scientific research award was beckoning to him.

"Okay, I was originally planning to have you check my body for any problems, but before that, could you take a look at my left hand? I feel like there's something in my left arm."

Upon hearing Rhein's words, Feynman's expression also became serious.

Feynman used instruments to conduct detailed examinations on Rhein, and finally removed a chip-like object the size of a fingernail from Rhein's left arm.

This thing is very thin and difficult to detect when it's attached to a blood vessel. If Rhein hadn't insisted that there was definitely something in his arm and made Feynman check it repeatedly, they might not have been able to find it.

After taking the sample out, Feynman immediately took it to be tested.

Two hours later, Feynman returned and exclaimed to Rhine in amazement that the object was made of a legendary memory metal. He had always thought that this metal had not yet been produced, but he was surprised to find that the finished product already existed.

Then, Feynman's expression changed, and he said to Rhine with a serious look, "Rhine, you need to report this. It's a locator."

Implanting a tracking device on the highest-ranking officer of an army group is a serious crime, punishable by a military court.

Rhine, however, showed no surprise.

"Feynman, don't let this get out. I'll handle it. Also, when was the last time this locator sent a signal?"

"Thirty-six days ago," Feynman said.

Thirty-six days ago, exactly three days after the signal was given, Lu Yuan was arrested.

......

Rhein took the locator back to his office and sat down in his chair, staring at the thin locator in his hand with a strange expression.

If he's not mistaken, the locator was probably given to him by the royal family.

This conclusion was reached after much consideration by Rhine, and it all started after the long road to rescue.

After rescuing Lu Yuan, the most important thing for Rhine became figuring out why the command post hiding Lu Yuan had been exposed. He couldn't let such a thing happen a second time.

Therefore, Rhine ordered his subordinates to use various methods to interrogate the surviving witness.

No matter how they asked, the survivor insisted that he knew nothing.

Rhine watched the entire interrogation process and felt that the survivor didn't seem to be putting up a fight, but rather seemed to genuinely know nothing.

However, they didn't get nothing out of that survivor.

The survivor confessed to the entire process of their capture of Lu Yuan.

After that costly operation to arrest the fake Lu Yuan A, they didn't actually doubt his true identity.

On the contrary, the fact that so many insects were lurking around Fake Lu Yuan A only made them more certain that Fake Lu Yuan A was the real one.

However, due to the excessive casualties, they were no longer able to forcibly seize the goods. So, under the captain's instructions, they lay in wait and sent insects to secretly follow the fake Lu Yuan A, observing him in secret and waiting for an opportunity to act.

However, after observing for a while, they still discovered some flaws in the fake Lu Yuan A.

With the case of fake Lu Yuan B preceding them, they inevitably began to doubt the identity of fake Lu Yuan A, but they could not ultimately confirm it.

Then the captain said he needed to report to the Crown Prince.

A few days later, the captain produced a coordinate and led them to lie in ambush around it. That coordinate was the location of the command post.