After a while, Zhang Yu returned to Liufeng Tower, and according to Qu Hanyan's intention, he summoned everyone, including Ji Dart, to the courtyard in the middle of the second courtyard in the West Courtyard. At this time, the wind was stronger than before noon, and it was difficult to open your eyes if you stood in the wind. Chan'er, Hua Wangqiu, Qi Ying and the others' long hair really fluttered in the wind, even if they blocked the strands of hair on their cheeks with their hands, the ends of their hair were still swaying in the wind.

"In this kind of weather, Mr. Zhang called everyone here, but what did you find?" Wei Guang stood in the wind, but he couldn't help but ask with his eyes half-closed.

"Even if you have something to say, can't you go into the room and say it?" Hua Wangqiu continued.

"Before you enter the room, please keep in mind the layout of your surroundings. Zhang Yu said as he stretched out his right hand and pointed clockwise from the direction of the south chamber to the west chamber and the north chamber.

After seeing that everyone did what he said, Zhang Yu did not rush to answer everyone's questions, but made a gesture of invitation and let everyone into Ruoyi's room. Qi Ying seemed to hesitate slightly, but she also walked into the room like everyone else, leaning against the corner of the wall. Zhang Yu then took the door of the room, looked at Qu Hanyan, and said:

"I'm ready with pen, ink and paper, prince, please. ”

Qu Hanyan didn't say much, just picked up a brush from the table, dipped it in ink, and sketched it on rice paper.

"This is the courtyard we are in now, with the west wing above, the south wing on the left, and the north wing on the right. Qu Hanyan said while sketching the three rows of wings in the second courtyard with a brush, and stretched out his left hand to point on the upper right side of the rice paper, "Each wing room is the same size, about two zhang long and one zhang wide, and the wing room on the north side of the west chamber is Ruoyi's boudoir, which is also where we are now." ”

"What is the purpose of Childe in drawing this layout?" the singer wondered.

"It didn't take long to see. Qu Hanyan raised the corners of his mouth and looked at Xin Pupu, "Can you ask the second game master to help you in the next favor?"

"Please. Xin Pupu walked into Ruoyi's room, and like Qu Hanyan before, he felt that something was wrong, and at this moment, Qu Hanyan's sudden question couldn't help but interrupt his thoughts.

"The two wings of the south chamber are the temporary residence of the second bureau master, please draw the location of the doors, windows, tables, stools and beds of each wing room on the map of these two rooms, and show it. ”

"Good. Xin Pupu took over the brush, and in a short time he had already placed the structural layout of the two wings in the south wing on the drawing paper.

As Xin Pupu stopped writing, he and Chan'er instantly grasped the key, and immediately understood Qu Hanyan's intentions, and invariably looked at Qu Hanyan, and Qu Hanyan set his eyes on Qi Ying at this time.

"These two wings in the north chamber are going to bother Boss Qi. Qu Hanyan's eyes seemed to be smiling, and he said to Qi Ying.

Of course, Qi Ying knew Qu Hanyan's purpose better, but she didn't stop it, she still leaned her back against the wall, and at the same time gave Chu Xue a look, and said:

"The first snow, just do it. ”

"Give me the brush in the second game. Chu Xue said, stretching out her hand towards Xin Pupu, who just raised his hand and handed over the brush.

Chu Xue and Qi Ying knew Qu Hanyan's thoughts the same, but with Qi Ying's instructions, Chu Xue didn't care about anything, but drew the layout of the two wings in the north wing according to the truth.

"From the picture, it is indeed the same as when you look at it in the courtyard, the two wings in the south wing and the two rooms in the north wing are completely symmetrical. The two wings of the south wing are the windows on the south side to the west, the door to the north side to the west, the bed to the east side, and the table and stool to the west side, while the north wing has the windows on the north side to the west, the door to the south side to the west, the bed to the east side and the table and stool to the west side. The two doors of the south wing and the two doors of the north wing are far away from each other, and they are impartial and opposite. Qu Hanyan said this, his eyes took off the drawing paper, and he raised his eyes to look around at everyone, "Mr. Fang Cai Zhang asked everyone to keep in mind the surrounding environment, and the location of the doors of the two wings in the north wing, it is difficult for you to think about it. ”

"The doors of the two wings are also symmetrical, and the distance between the south door and the south wing is equal to the distance between the north wing door and the north wing. Hua Wangqiu replied.

"Then if I draw the layout of this wing...... Qu Hanxian said, sketching the layout of Ruoyi's room in the upper right position: the window is on the west side, the door is on the east side, the bed is on the south side, and the table and stool are on the north side.

Needless to say, the prince's room must have been a mirror image of this one: the window was on the west side, the door was on the east side, the bed was on the north side, and the table and stool were on the south side. Ji Dart Master said quickly.

The theory should be so, but it is not. ”

"How is this possible?" said Master Ji.

"The layout of the young master's room and Miss Ruoyi's room is exactly the same, the window is on the west side to the north, the door is on the east side to the north, the bed is on the south side, and the table and stool are on the north side. Chan'er said softly.

"If it were so distributed, the doors of the two wings should be inclined to the north, and it would not seem neat and symmetrical in the courtyard in any case......"

"It's possible, as long as you make a slight change......" Wei Guangqian, who hadn't spoken for a long time, picked up the brush that Qu Hanyan had placed on the table, and drew a new picture on another piece of rice paper, and everything was clear when he put down the pen.

"This ...... On the north side of this chamber there is a secret room of length and width. Chu Jingxin looked at the picture, and then looked sideways at the north wall of the room, "Will there be any mechanism here?"

"If you don't know the layout of the two wings in the West Wing, it would be difficult for ordinary people to think that there will be extra space next to it. Hua Wangqiu looked at Qu Hanyan and said.

"Actually, even if I didn't know what was going on inside these two wings, I should have thought of this a long time ago. Qu Hanyan denied Hua Wangqiu's statement.

"Huh?"

"The middle of the south chamber and the north chamber are three zhang apart, and their respective widths and lengths are five zhang. The length of the two wings in the west chamber adds up to only four zhang, so if the other one zhang does not disappear out of thin air, there is another explanation. ”

"I just don't know if this extra space is connected to the north wall of this room, or to the west wall of Boss Qi's room?" Zhang Yu looked directly at Qi Ying and asked slowly.

"Mr. Zhang didn't bring someone to check it, there is nothing suspicious in my room, and I believe that it is the same here. Qi Ying said confidently.

With a hint of a smile on his lips, he obviously didn't believe Qi Ying's words, he gestured to his guards, and two of them walked to the north wall of the room and tapped them up, down, left, and right, but they couldn't find any mechanisms or flaws. Seeing this scene, Zhang Yu couldn't help frowning, and even began to doubt Qu Hanyan and his own judgment.

"Everyone has seen that the walls of Ruoyi's room and I are all thick solid walls, as for how there is extra space in the layout of the room, I don't know very well, after all, Liufeng Building was only put down a few years ago. ”

When Zhang Yu and Qi Ying secretly clashed, Qu Hanyan always quietly watched the situation in front of him, trying to recall the clues left by Ruo Yi when he was killed.

The picture of the four vertical blood stains suddenly floated into Qu Hanyan's mind.

Different from the neatness of the four vertical blood stains on the ground when Jia Daoshi and Ding Fu were killed, the four blood stains written down by Ruo Yi in blood were the first and second blood stains on the left slightly inclined to the lower left, while the tail of the most right blood stain had a faint tendency to the right.

Qu Hanyan suddenly thought that maybe Ruo Yi wanted to write something but couldn't finish it, or maybe something was erased when the blood was not dry...... Thinking of this, Qu Hanyan had a flash of inspiration in his mind, and he estimated the distance between the ground where Ruo Yi wrote his handwriting and the root of the north wall with his eyes, and for a moment he felt a feeling of blessing to his soul.

"What idea does Childe have in mind?" Xin Pupu noticed Qu Hanxuan's expression, so he asked.

"The length of the north wall is one zhang, and the root of the wall is about half a zhang away from the blood character left by Ruoyi, which makes me think of a little possibility. Qu Hanyan said unhurriedly.

"What Wang Gongzi said is ......" Zhang Yu also looked at Qu Hanyan with an inquiring gaze.

"If the whole wall rotates around the center point of the root of the north wall, then the root of the wall will pass through the blood characters left by Ruoyi, thus erasing part of the handwriting and becoming what we see. Qu Hanyan said as he stared at Qi Ying's eyes, and found a trace of panic in her eyes that was almost invisible, and he immediately became more sure of his thoughts.

"If the girl's hand is covered with blood, that is, if part of the blood is smeared, then the upper part of the text should be erased. Xin Pupu continued, "This makes me have to think of one word. ”

When Qu Hanyan heard this, he and Xin Pupu glanced at each other, and both of them seemed to see the answer in each other's hearts, so they each showed a tacit smile.

"According to the usual logic, we always think that if there is a hidden grid in the wall, there must be some mechanism on the wall, but we never think about the ingenuity of the gap in the edge of the wall. Chan'er said, looking at Zhang Yu, "Please catch the master and check it again." ”

Zhang Yu nodded to Chan'er, and then took a few steps forward himself, groping down one by one at the edge of the north wall, and after a while, he finally found an inconspicuous bulge about two inches above the ground. Zhang Yu looked stunned, and soon a flash of joy flashed in his eyes, and with a slight force in his hand, he pressed down the bulge, and then the wall turned really slowly.

Qi Ying saw that her secret was about to be revealed in front of everyone, and her eyes were suddenly murderous, although her body did not move, she raised her arm lightly towards Zhang Yu's back, and there was some imperceptible shaking in her cuffs.

"Be careful!" Hua Wangqiu, who had been staring at Qi Ying's movements, noticed the abnormality and hurriedly shouted, but Zhang Yu had no time to react.

At this critical moment, Qu Hanyan violently threw the knife in his hand horizontally, and the blade of the knife was between Zhang Yu and Qi Ying in time, and the next moment, four silver needles were firmly rooted in the scabbard. The knife passed through the air horizontally and landed at the feet of Chan'er, who was standing on the opposite side of Qu Hanyan, so Chan'er squatted down and picked up the knife, carefully examining the silver needle on the scabbard.

The fox's tail was finally revealed. Hua Wangqiu looked at Qi Ying coldly, "I finally understand the meaning of the four blood stains written by Master Jia, it turns out that it refers to the secret weapon you used." ”

Seeing that everything was no longer hidden, Qi Ying no longer made a move, but instead made an appearance of listening to the movement outside the house, and said with a chuckle:

"The rain seems to be falling. ”

On the other side, Qu Hanyan's gaze stopped at Chan'er, he knew that Chan'er had studied the secret weapon a little, so he tentatively said:

"Do you see anything?"

"It's a gut-breaking needle...... Chan'er said softly, she was shocked for a while, looked at Qi Ying and asked, "Do you know someone from the Tu family?"

"Do you know the gut-breaking needle?" Qi Ying heard this, withdrew her gaze, and there was a trace of surprise in her gaze when she looked at Chan'er, and asked instead of answering, "What do you have to do with Zhong Liyuan?"

Hearing Qi Ying ask like this, Chan'er was even more convinced that Qi Ying and the Tu family knew each other, but she didn't know which of the two Tu brothers she knew. However, according to Qi Ying's identity as belonging to the mysterious organization "Liu" of the Night Country, I am afraid that the only person who has dealings with her will be Tu Zhen, who escaped from the lonely country after failing to seize the position of the head of the Tu family.

"Is this Dongshan Zhongliyuan's secret weapon?" Xin Pupu also looked at Chan'er and asked.

"It was made by Zhongliyuan, but it was stopped many years ago, and only the two brothers Tu Hai and Tu Zhen of Tu's ore still have this secret weapon in the world. However, this secret weapon itself should not have killed people instantly, and I never thought of this possibility, so it seems that it was probably the silver needle that penetrated Jia Dartshi's internal organs, causing him to lose his life. ”