Went ashore and came to a relatively large space, this is still a relatively large cave, there is an artificially built stone slope in front, there is a large stone gate on the top of the stone slope, which is closed, and there is a stone carved dragon on both sides of the stone gate.

After going ashore, Shangguan immediately opened the cube, checked it, and the clothes wrapped in it were still dry, and said, "Hurry up and put them on." ”

The girls shivered and wiped the water from their bodies and then began to get dressed. Li Zhenai said: "No, my hands and feet are frozen and I can't move." ”

Senna smiled and said, "So what do you want to do?" Do you want Brother Yu to warm you up? Ha ha. ”

Li Zhenai said: "I don't dare, then Zhao will still swallow me alive!" ”

Sena looked at Zhao Yi with a smile, only to see that she didn't react to the ridicule of the two at all. So he smiled and asked, "Why didn't you react at all?" ”

Zhao was still immersed in the horror just now, and said: "It's okay, if you want to huddle together to keep warm, then Baobei." ”

Hearing what Zhao still said, Shangguan Yu said: "Then if that's the case, cherish my sister, come here, let me hold you......"

Zhao still immediately glared at him: "You dare!" ”

Sena laughed even more happily, which made Li Zhenai laugh too, and Zhao was still embarrassed to laugh with them, saying: "Brother Yu is mine, it's okay to joke, if you want to use it, then don't be delusional, you know the two sisters?" ”

"Yes, Miss Zhao, Brother Yu is your exclusive personal belongings, and no one can use them!" Senna teased her.

Shangguan Yu saw the three girls frolicking, and said, "It's okay to relax, it's okay to wait for a while, I don't know what the situation will be, everyone must always be vigilant." ”

After a while, everyone was dressed, backpacked, and weapons were armed. Shangguan Yu also put away the frisbee.

After the frisbee shrunk, it turned into a brick, and Shangguan put the brick in his hand and shook it, and said to himself: "This is really a good baby." ”

After everything was cleaned up, everyone left the water's edge and walked up the slope, and came to the big stone gate, only to see the two stone dragons, one of which had a stone ball in his mouth, and the other did not.

In front of the big stone gate there is a small flat land, in the center of the flat land, directly facing the stone gate about ten meters away there is a stone carved object, the appearance is peculiar, I can't tell what it looks like.

There are two curved ditches on the side of the moment, leading to the two stone dragons on the side of the stone gate, and one of the stone ditches has a stone ball in it, which is the stone ball that fell from its mouth.

There is a hole on each side of the stone carving, and the hole is exactly as big as a stone ball.

Looking at this moment again, there is a handle shaped like an electric brake in front of it, a small disc on the left and right, the left one is broken, and the right one shows one circle after another, and it is a circle set.

Shangguan Yu asked, "What the hell is this?" How do you open this door? ”

Senna looked at it and said, "This should be the mechanism that opened the door." ”

"How?" Shangguan Yu asked

After two laps on the flat ground, Senna said, "I have studied the ancient tomb before, and there should be a hidden mechanism here, and I understand it this way, this stone door should be hung up, and if you want to hang it, you must have something to sink." ”

Unexpectedly, this Sena really knew everything, Shangguan Yu admired her in his heart, and asked, "What do you want to sink?" ”

"It has to be something heavy, like these two stone balls. ”

One stone ball is in the ditch and the other is in the mouth of another dragon. Senna pointed to the two holes and said, "The mechanism must be in these two holes, and when the stone ball sinks, the stone door will be hoisted." ”

Shangguan Yu said: "Then try it." ”

After that, he went to push the big stone ball, the stone ball was very heavy, but it was nothing to Shangguan Yu, and he was easily pushed by him.

Zhao Yi and Li Zhenai hurriedly stepped forward to help, and with the sound of rolling loudly, the big stone ball was rolled into the hole after a while, making a bang. I heard the stone door humming, as if it was about to be hoisted, but it moved twice and then it fell silent.

Senna said, "One stone ball is not heavy enough to lift the stone gate, and the stone ball from the dragon's mouth must also be removed." ”

"How?" Shangguan Yu asked.

Senna came to the moment, took the hand and said, "This." ”

Shangguan Yu tried to pull, but he couldn't pull it, he felt like he was stuck by something, and he was about to pull hard, but he was stopped by Sena: "Don't use too much force, be careful to break it." ”

"What then?"

Senna pointed to the disc with the circles on it and said, "Combination lock." ”

Shangguan Yu looked at the disc, which was to turn the circle above to unlock it, and said, "This is to be unlocked, but who knows the password?" ”

Senna smiled and said, "It's hard for me, there is mathematical knowledge in this." ”

With that, she began to spin her circle, and after several turns back and forth, she heard the dragon's head make a khaka sound. Senna smiled and said, "It's okay to pull." ”

Shangguan Yu grabbed the handle, pulled it suddenly, and pulled it down in one fell swoop, and saw that the dragon's head spewed out a ball of fire violently, followed by the dragon's mouth opened, and the stone ball fell.

Shangguan Yu asked with great admiration: "How did you do it?" ”

"Haha, secrecy!"

The stone ball fell into the stone ditch and rolled towards it, but stopped halfway through. Shangguan Yu sighed: "Alas, you have to come manually." ”

"That's because the vibrations of the displacement make the layout of the place," Senna said. ”

Shangguan walked over, pushed the stone ball, and pushed the stone ball into the hole.

When the two stone balls were pushed into the hole, a loud noise was heard, and the large stone door was slowly rising, revealing an upward staircase inside.

Shangguan Yu gave a thumbs up to Sena: "Big cousin, you're really smart." ”

"What's smart? It's all my blindness. Senna smiled.

"Blind? Can't you? Shangguan Wen walked towards the big stone gate at the same time, and the girls also followed closely.

Senna said: "It's really blind, this combination lock has four circles, each with four directions, so this is a four-digit dead-based digital combination lock." ”

"Four-digit quatery?" Shangguan Yu asked, feeling so profound.

"yes, so I blinded the number: 3110."

"Then why would you be blind to this number? Even if you're blind, you have to have a reason, right? ”

"3110 in quaternary corresponds exactly to 314 in decimal. ”

“314？”

"Yes, that's right, 314, pi, π, the number commonly used in the pyramid."