What are the keys for?

Lockpicking, of course.

So what kind of lock is this key in Lu Xuan's hand used to open?

Rosen doesn't have 100 percent proof of this, but he has an impeccable explanation in mind.

But in an instant, Rosen's mind seemed to burst out with fire trees and silver flowers, allowing him to see the glimmer of light in the night.

Why did the murderer of Cao Qing go to such lengths to set up a secret room that didn't seem to make any sense at all?

I see.

From the beginning, Rosen did not believe that Lu Xuan was the murderer of Cao Qing.

Although Lu Xuan's motives are very obvious, Cao Qing is not stupid.

If Cao Qing was sitting opposite Lu Xuan in the mansion that night and drinking tea, then Cao Qing would not have been able to drink Hua Lingsan so easily.

Because he knew that Lu Xuan had an enmity with him, he would not fail to take any precautions.

Even if Lu Xuan's magic power was so great that Cao Qing did not blame him for the past, and drank the poison he had prepared, he had no way to successfully kill the other party the moment Cao Qing found out that Qi Hai was sick.

Because the difference in strength between the two cannot be calculated.

What's more, Lu Xuan was already seriously injured, and it was difficult to even walk.

What did he use to kill Cao Qing?

By willpower?

In other words, even if Lu Xuan really wanted to kill Cao Qing, tonight would definitely not be the best time.

So this thing is very unconscionable.

But when Lu Xuan took out the copper key in front of Rosen, Rosen finally understood.

"You set up the secret room?"

Lu Xuan nodded without hesitation: "Not bad." ”

So Rosen asked the second question: "Did you see the murderer?"

"Nope. Lu Xuan shook his head and added, "When I arrived, Cao Qing was already dead. ”

"Why did you go to Cao's Mansion?"

"Because of this. Lu Xuan took out something from his sleeve again and put it on the table.

It was a note.

It reads: Tonight, please come to my house for a while.

The payment is Cao Qing.

Lawson was silent for a moment with the note, and then said, "Is this handwriting Cao Qing's?"

Lu Xuan nodded: "At least in my opinion, it's true." ”

It's kind of interesting.

"Who gave it to you?"

"According to the doctor at the infirmary, it was given to him by a man wearing a hat, and he didn't see his face clearly. ”

Hearing this, Rosen couldn't help but laugh: "It seems that the murderer has already chosen you as a scapegoat." ”

Lu Xuan took a deep breath: "Now it seems that it should be like this." ”

Rosen shook his head and said, "Didn't you ever suspect that if it was really Cao Qing who invited you to meet, why did you have to be so secretive?"

Who would have thought that Lu Xuan would give a jaw-dropping answer.

"I thought Cao Qing was trying to kill me tonight. ”

Rosen was shocked: "So you're going to die like this?"

"Of course not. Lu Xuan smiled: "I was naturally prepared, but I didn't expect ......."

Saying this, Rosen suddenly remembered something and asked, "So you told me before that you wanted to have a private chat with me, and that's it?"

Lu Xuan nodded.

Seeing this, Rosen couldn't help but feel a little ridiculous, or more accurately, confused.

Cao Qing wants to kill you, what's the use of you discussing with me?

Besides, according to the relationship, your Lu Xuan's weight in my heart is not as good as Cao Qing.

Are you so sure I'll help you?

Neurotic bar!

However, Rosen did not intend to delve into the question, instead returning his attention to the copper key.

"If, as you said, Cao Qing was already dead when you arrived at Cao's Mansion, then why did you risk being discovered to set up this secret room? Could it be that you have guessed who the murderer is, and what evidence do you want to help him cover up?"

Lu Xuan shook his head and sighed softly: "Didn't you notice that the door lock in Cao Qing's bedroom was a little strange?"

Lawson was stunned, and then subconsciously said: "It's not very common, generally speaking, no one will install copper locks in their bedrooms, and even if they do, most of them will hang outside the door, how can anyone lock themselves up when they are sleeping?"

This shows that Cao Qing is worried that someone will sneak into his room while he is asleep. ”

"So, he was afraid that he would be plotted against while he was asleep?" Rosen analyzed along Lu Xuan's train of thought.

Lu Xuan nodded: "What you are talking about is one possibility, and there is another possibility, that is, he hid something very important in the room." ”

Listening to Lu Xuan's explanation, Rosen suddenly frowned: "Then isn't he afraid that someone will break into the empty door when he goes out?"

Lu Xuan smiled: "Then it depends on the size of that thing, if it is easy to carry, Cao Qing can hide it on himself when he goes out." ”

"Sounds ......" Rosen raised his eyebrows slightly: "You seem to know what Cao Qing is hiding." ”

"Not bad. Lu Xuan admitted without hesitation.

Rosen didn't answer, waiting for Lu Xuan's next explanation.

"It's an account book, which records the money and food he embezzled in last year's campaign to suppress bandits, as well as the accounts of sharing the spoils with several other flag commanders. ”

As the words fell, Lawson's eyes widened suddenly, and he felt a chill behind him rush to the top of his head.

Why did Lu Xuan know about the ledger?

It shows that he has been investigating Cao Qing for a long time.

So why did Lu Xuan investigate Cao Qing?

Is it to present these incriminating evidence to Lin Qianjun, so that he can successfully ascend to the throne and replace Cao Qing as the flag commander?

If this conversation had happened before tonight, Rosen would have thought so.

But it's not that simple.

Back to the two previous questions about Lu Xuan.

Why did he set up the secret room?

It is not to cover up the identity of the murderer, but to protect the scene, if you think about it at a deeper level, it is to induce the investigators to conduct a carpet search of Cao Qing's bedroom while trying to decipher the cause of the secret room, and find the ledger that Cao Qing hid in the room.

But it's a pity that because of the suddenness of the incident and the urgency of time, Lu Xuan has no way to make the secret room more complicated.

In other words, it is likely that the mystery of the Chamber of Secrets will be solved very easily.

As it happens in reality.

Therefore, Lü Xuan took the risk of making a second move.

This is also the second question he left with Rosen before.

That's the question that Lawson opened with.

Why didn't Lu Xuan listen to his arrangement, escaped from Yihuafang inexplicably, and was even caught by the Adjudication Division?

Because he needs to escalate the matter.

To whom is it reported?

That's where the question comes in.

As mentioned earlier, Lu announced that the secret room was set up to induce investigators.

Who are the investigators here?

Theoretically, when Cao Qing's murder happened, who should investigate?

Not Lawson, of course.

Nor is it a garrison.

But......

Adjudicator Division!

No wonder the people from the Adjury Division came so quickly.

It's no wonder that the people of the Adjudication Division can catch Lu Xuan by wandering outside casually in two steps.

No wonder Lu Xuan was not only punished after entering the Adjudication Division, but was also arranged to wait in this stone room.

No wonder Lu Xuan was confident that when he was facing Cao Qing's killing intent, Rosen would help him.

A wry smile rolled into the corners of Rosen's mouth.

"So you're ...... too"

Lu Xuan nodded, and then stretched out his hand across the table: "I have offended a lot before, and I hope you will forgive me." ”

Rosen finally deeply realized what it was like to be put on someone's table, especially since this person was still his master......

He leaned forward, shook hands with Lu Xuan, and said: "Speaking of which, I have heard Wu Xiang say before, saying that you were caught and imprisoned for two years by the Ruling Division for evading military service, could it be that ......at that time?"

Lu Xuan smiled lightly: "That's right. ”

"Then, my master once received a secret report that during the battle against bandits last year, some people in the garrison were greedy for public food, falsely reported their war exploits, and slaughtered innocent people, and this matter was also your ......."

Lu Xuan nodded again: "Yes." ”

As soon as these words came out, Rosen suddenly felt that his whole body was collapsed.

Otherwise, it's still a professional spy job!

From beginning to end, I never suspected that Lu Xuan was also an undercover agent inserted into the garrison by the Adjudication Division!

And they've been lying down for three years!

In terms of seniority, whether it is in the garrison army or in the adjudication department, Lu Xuan is his senior!

In this way, it seems that all kinds of things that happened before have different explanations.

Lu Xuan took the initiative to take over the task of giving Rosen a dismissal, not to invite credit, but to protect Rosen......

The reason why Lu Xuan took the initiative to fight with Rosen was not because he really hated Rosen, but because he wanted to establish a hostile image in front of everyone.

In this way, even if one of them is found to be an undercover agent in the future, he can protect the other person from a certain angle......

Specialized!

Convinced!

At this moment, what can Rosen say besides being convinced?

"Brother, tell me honestly, in the garrison, besides the two of us, who else is a spy?"

"Uh......" Lu Xuan smiled bitterly and said: "The word spy is not used appropriately, right...... Besides, Zhan Sicheng only told me your identity, and I don't know the rest. ”

Hearing this, Rosen felt a little moved.

Although Zhan Linwen, the master, is not very reliable most of the time, such as throwing himself a copy of the herb and tree qi cultivation formula, he has never talked about how to practice, but since he told Lu Xuan his identity, there is only one reason.

hopes that Lu Xuan will take care of himself in secret.

Even Rosen was thinking, when Lu Xuan opened his mouth to challenge him that day, was he going to deliberately lose to himself at the review ceremony, so as to save himself a wave of prestige?

Of course, Rosen didn't ask, but he was willing to think things in a good direction.

As he spoke, suddenly, the door of the stone house was gently pushed open, not to the outside world, but to the prison.

Zheng An, who hadn't seen him for a long time, stepped in.

"Presumably both of you have officially met, so let's get started. ”

Rosen was slightly stunned: "What to start?"

Zheng An came to the table with a smile and sat down, and said, "Of course, I analyzed the case, how about it, who do you think the murderer is this time?"