Generally speaking, the entrance to the secret room is usually built in the owner's usual living place, such as the imperial study in the palace. But unlike the Imperial Palace, the main courtyard of Shou'an Hall of Bai Lao Taijun is not a hidden place, and people come and go every day. The juniors would come to ask for peace, and the Li family often came here to ask for general affairs.

Although it is generally difficult to find as long as the secret room is built deep, the risk of building it under the main courtyard is higher, and it is obvious that the secret room of Shou'an Hall was not built under the main courtyard.

This also caused Zhu Luan to always feel that there was a "thing", but he never found the secret room.

The west courtyard of Shou'an Hall is located in the middle of nowhere, and it is the place where Bai Lao Taijun punishes and detains his subordinates who make mistakes.

can support the British government in the wind and rain, of course, Mrs. Bai does not rely on the kindness of the house, she has a life on her hands, and the fine work inserted by other families, and the subordinates who were not clean when her husband and son died, all disappeared here quietly.

Usually the whole British government walks around here.

I didn't expect to be here. This is probably the so-called "black under the lamp", Zhu Luan thought to himself.

Zhu Luan walked back to the place where she had just heard the echo, she held her breath, calmed down, and gently tapped the ground with her Xuantie bracer.

"Ding...... Bite...... Ding......"

She knocked very lightly, changing places as she knocked, and found that the places where the hollow sound could be heard were mainly concentrated against the wall, and it was difficult to hear it when she retreated.

The specific location of the secret room should be involved between the main courtyard and the west courtyard, and the main house of the west courtyard where Zhu Luan was imprisoned and the secret room overlap underground.

The mechanism for the opening of the chamber is likely to be in the vicinity of this area.

The process of finding the mechanism of the opening was much easier than Zhu Luan expected.

She lay straight on the floor.

"Miss? What are you doing? Yuying asked, looking over at her.

"Shh Zhu Luan made a silent gesture to her.

Yuying obediently stopped talking, and looked at the young lady lying on the ground with big eyes and puzzled.

Zhu Luan first put his ear to the ground, and could only hear the footsteps of the guards outside the door, and could hardly hear the sound underground, which showed that this secret room was built very deep and should be a built-in secret room.

She turned her head to the left, looked closely at the ground from a very low position, and found no bumps or dents, then turned her head to the right, as before, without the slightest unevenness.

The entire interior was extremely dark, with only a faint light streaming in through the nailed windows.

Zhu Luan rolled up his sleeves, raised his arms, and used the dark iron bracer on his wrist as a mirror to reflect the faint sunlight onto the ground, gradually adjusting the angle to sweep the ground.

Suddenly, a smile appeared on the corner of her mouth.

The ground is smooth and flat, but under the light of the faint light, there is a place on the ground on the right that is extraordinarily bright.

Zhu Luan got up and walked here.

This is a green brick paved on the ground, and at first glance it looks no different from the surrounding bricks, even the distance between the gaps. Zhu Luan stretched out his hand and touched it, and a smooth feeling came through his fingers.

This is the feeling that can only be left by polishing or being touched by human hands from time to time.

Zhu Luan squatted down and pulled out a short knife as thin as a cicada's wings from his bracer. She carefully inserted the short knife into the gap between the green bricks, and the plaster plastered in the gap was indeed very soft, just a trick.

She was engrossed in scraping off the plaster from the cracks, and then took out a short knife, caught the green brick, and slowly pulled it up. With a slight grinding sound, the green brick was pulled up.

However, the room was quiet, and nothing changed. Zhu Luan was not disappointed, carefully observed the pit left after the green bricks were pulled out, and found that inside the pit was a Luban lock.

"Miss, what is this?" Yu Ying walked over on tiptoe and asked quietly like a thief.

"This," Zhu Luan stroked the cold metal lock plate, and replied softly, "This is the Luban lock." ”

"Luban lock?" Yuying was taken aback, "How do you feel different from what I played when I was a child?" One, two, three......" Yuying counted with her finger at the cleats, "how can there be thirteen?" Aren't there only six Luban locks? ”

Zhu Luan smiled.

Luban lock is also called Kong Ming lock, according to legend, it is a kind of lock invented by Zhuge Kong Ming according to the principle of gossip metaphysics during the Three Kingdoms period, widely spread among the people, can be used as a toy, and there are also designed to be organs, it looks simple, in fact, the mystery is endless, it is difficult to complete the assembly.

The traditional one is six, the third generation is nine, and the one in front of you is a very rare thirteen-plate Luban lock, which belongs to the Luban lock of the partition plate, and it is also the most difficult category.

"How many ways are there to put this together?" Yuying asked with wide eyes.

"One thousand eight hundred eighty seven thousand three hundred and sixty-eight species." Zhu Luan replied.

"What?" Yuying's eyes almost fell to the ground, and then she looked at Zhu Luan with a look of adoration, "Miss is really amazing, I know this." ”

Usually most people will just think she is talking nonsense, Zhu Luan smiled and accepted the little girl's praise, because she knew that what she said was completely correct.

The one in front of me is the most difficult one among the thousands of stitching methods, and the difficulty is 1033.

If you don't know the order of assembly, it's hellish difficulty to solve.

Zhu Luan sat on the ground regardless of his image.

Luban lock is one of her toys when she was a child, once the mother is busy with official business and has no time to take care of her, she will throw her a Luban lock, from the common six, nine, twelve to thirteen, in the lonely deep palace, the first years that were ignored by everyone, she spent time with this.

Her hands moved quickly, dizzyingly fast.

"Miss, you're so good at playing with Luban locks," Yuying sighed beside her, "Miss, what locks do you know?" ”

"Huh?" Zhu Luan's hands didn't stop, and the fast movements made people dizzy, and he replied casually, "Think about it, big and small Kong Ming, four seasons, Kong Ming chain, twelve squares, square corners, twenty-four, eighteen hooks, sister balls, six-square locks, fourteen elder brother locks, small pineapples, big pineapples, three-eight knots, ......"

She didn't finish her words, only heard a soft click, the last lock plate was removed, and the thirteen-plate lock was unlocked.

Yuying couldn't help but exclaim.

Although Miss's movements were so fast that she couldn't see clearly, she instinctively felt that Miss seemed to have done something very powerful.

However, at this moment, with the slightest sound of brick rubbing, the green bricks in front of him suddenly collapsed downward, revealing a half-human-high hole diagonally downward, and inside the hole was a swarthy corridor.

"Remarkable."

A faint exclamation suddenly came from the depths of the corridor.

The voice was muffled, as if it came from a thick wall, and the soft clapping of hands seemed to be heard.

"Although it was said that it was according to the drawings, I didn't expect that Granny Chen, you would be able to unlock the Thirteen Cities in less than a stick of incense this time."

It was a man's voice, and his words were full of surprise and regret.

"It's my pride."

He said.