"Thank you, Immortal." Lan Yue made a blessing to Li Canghai.

Li Canghai didn't care about them, so he let Yu Chengen push him into the murder room.

"Let's get started, be sure to look carefully." After Li Canghai glanced at the entire room, he spoke.

Yu Chengen nodded, then walked to the room and searched carefully.

Li Canghai came to the table, picked up the copper lock and looked at it.

This copper lock was found by Conan before, this copper lock is shaped like a small stone mortar, and in the 'recess' groove is a lock cylinder thinner than bamboo chopsticks, but the lock cylinder has been broken from the middle.

Li Canghai weighed the copper lock and looked back at the door, where the wood that had fallen from the door was scattered on the ground.

The door was slammed open with great force, half of the door fell to the ground, and the other half appeared to be tilted.

After Li Canghai thought about it, he came to the door by himself and carefully observed the two doors.

As a result of the impact, one of the two doors broke and fell to the ground, and the other was attached to the door frame, and both were damaged to varying degrees.

The door that fell to the ground was not anything unusual, and the impact was so strong that the knocker of the back door of the door knocked down.

On the contrary, it was the door that was about to fall that attracted Li Canghai's attention.

This half of the door was damaged, but it was not particularly bad, and there was an iron chain hanging from the knocker inside, and a ring hanging from the bottom of the chain, which seemed to be the knocker of the other half of the door.

Li Canghai looked at the door, and a thought suddenly flashed in his mind, but before he could catch it, it flashed away.

He rubbed his brow, then fell into deep thought.

From what he saw in front of him, it can be inferred that after killing Hongmei, the murderer hung her to the beam of the room, and then deliberately made the room messy, and after doing everything, the murderer tied the door knocker with an iron chain, and then locked the door with a copper lock.

But the question is, how did the murderer leave the room after locking the door?

All the windows in this room can only be locked from the inside, and he has checked the windows, and all the windows are like doors, they are locked from the inside, and there is no damage, and it is impossible for the murderer to escape through the windows.

"The doors and windows are closed, and they are all locked from the inside, is there a secret passage in this room?" Li Canghai thought to himself.

He searched the walls of the room for a while, but found no secret passages, and quickly dismissed the idea.

At this time, Yu Chengzhuo ran over happily, holding a half-finger-long brass key in his hand, and said, "Brother Li, I found it!" This should be the key! ”

Li Canghai hurriedly took the key, and he inserted the key into the copper lock, which was indeed very suitable.

"Where did you find this key?" Li Canghai asked.

Yu Chengzhuo pointed to a row of wooden shelves near the wall and said, "It's under that row of wooden shelves." ”

"How could it be there?" Li Canghai looked at the wooden frame, and his brows suddenly furrowed.

The row of wooden shelves was located on the west wall, and after the murderer locked the door, why did he lose the keys so far?

Also, did the murderer deliberately throw the key there, or did he throw it away at will?

More and more mysteries appeared in Li Canghai's mind, which made the whole case more and more confusing.

"Brother Li, what did you think of?" Seeing Li Canghai low his eyebrows and pondering, Yu Chengen asked.

Li Canghai shook his head, he rubbed his eyebrows and said: "I have no clue, it is true that as you said, the murderer is like a ghost, after killing someone, he disappears out of thin air, and there is not even a trace left." ”

With that, he let out a long sigh and then fell back into deep thought.

It can be said that this is the most bizarre case he has encountered.

Murder in a closed room, he has not encountered it, and the first murder case he encountered when he came to Datang was a murder case in a closed room.

After committing the murder, the murderer used the ink fountain rope to pull up the latch of the door, creating the illusion of murder in a secret room.

However, this method of killing requires a specific factor, that is, there needs to be a gap in the ink fountain rope to pass through, so that the murderer can pull the rope outside the door and bolt the door latch.

And the case in front of him, although it is similar to the murder case in Xiaoyang Village, is also very different.

First of all, the room is closed, and there are no gaps in the windows.

Secondly, the door was closed, and it was locked from the inside with a copper lock.

Even with a similar method in Xiaoyang Village, it is impossible to do it.

Because this kind of copper lock wants to be locked, it must need to be inserted with a key, unless someone holds the copper lock with their hand and inserts the key with one hand to lock the copper lock.

But in this way, the person who locks the door will be locked in the house, and will not be able to get out without opening the brass lock, without breaking the doors and windows.

However, in the murder case in front of him, the murderer not only locked the copper lock in the room, but also left the room without leaving a trace, which is a bit incredible.

Li Canghai sat at the scene of the murder all afternoon, until night fell, he didn't come up with a reason, so he had to go back to rest.

After dinner, Conan came to Li Canghai's room.

Li Canghai poured him a cup of tea and said, "Brother Conan, in your opinion, who will be the murderer of this murder?" ”

Conan propped his chin on his hand and groaned, "As far as we know so far, we can't determine the identity of the murderer. I asked the people of the Zhang family, although Hongmei is Zhang Wenyuan's concubine, she is kind and has no quarrel with others, and has never heard of a grudge with others. No one seemed to have a reason to kill her. ”

Li Canghai nodded, and after thinking for a while, he said, "Brother Conan thinks Lan Yue and the others will be murderers?" ”

"I also had doubts about this, but as far as I know, Hongmei has a very good relationship with Lan Yue and others, and they are not like other big families, who fight for favor and intrigue and deceive me. It is precisely because of this that they have always won Zhang Wenyuan's favor, except for them, Zhang Wenyuan has never taken a concubine. Until a month ago, Zhang Wenyuan met Yu Yanrou and ransomed her, planning to take her as a concubine after building Baihualou. Conan said.

In this way, Lan Yue said that they are sisters, but it is true. Can this Yu Yanrou's identity be clarified? Li Canghai asked.

Conan shook his head and said, "At the moment, I only know that Yu Yanrou is the Oiran of the Pink Dai Pavilion, she and Yu Chengzhuo are brother and sister, the two were originally children of a rich family, but because they were deceived by bullies, their family fell into the middle." Yu Yanrou lived on the streets, and then entered the Fan Dai Pavilion as a prostitute, just because she was Lan Zhi Hui heart, and knew the piano, chess, calligraphy and painting, and soon became the Oiran of the Fan Dai Pavilion. At that time, Zhang Wenyuan went to Yangzhou to do errands, and happened to see Yu Yanrou, so he was fascinated by Yu Yanrou, paid to redeem her, and wanted to take her as a concubine. ”

"The Yu family is declining, doesn't Yu Chengzhuo know?" Li Canghai touched his nose and asked in surprise.

"Yucheng Zhuoyuan is studying in Chang'an, and he doesn't know what happened at home. It wasn't until I returned home a month ago that I learned that my parents had died and my sister was in the Qinglou. Yu Chengzhuo went to Fandai Pavilion and learned that Yu Yanrou had already been ransomed by Zhang Wenyuan and brought back to Zhang's house, so he came to Zhang's house to find someone. Because the two are biological brothers and sisters, Zhang Wenyuan did not embarrass him, but treated him politely and let him stay in the Zhang family. (To be continued.) )