It took us a lot of effort to climb to the top of this mountain from the side, and Xiao Lianshan carefully stood on the edge of the cliff and looked below.

"Brother, you can hang down from here, I'll go down first to see the situation, and if it's safe, you can come down again."

Before I could speak, I saw Wen Zhuo next to me unhurriedly tie the rope to himself, pulled it to make sure it was firm, and walked over and handed the other side of the rope to me and Xiao Lianshan.

"Forget it, don't toss, I'm the lightest, let's go down."

Wen Zhuo didn't pass by, but once he got serious, it was difficult for people to refuse, even the stubborn Xiao Lianshan didn't say a word, found a rock, put the rope around, and then tied the other end to himself, and said loudly with his foot on the rock.

"Go down in peace, you'll be fine unless I fall."

We all pulled the rope tightly, watching Wen Zhuo disappear little by little on the edge of the cliff, and it was a long time before we heard Wen Zhuo shouting loudly below.

"It's okay, let's all come down."

Xiao Lianshan fixed the rope, the second climbed down, then Yue Qianling and Gu Anqi, I finally checked the rope tied to the rock, it is easy to go down from here, but it will be troublesome to come back, if this rope is broken, we will be trapped in the cave halfway up the mountain.

When I went down the rope to the cave, I realized that the cave was bigger than we had imagined, and there was an echo in it, and there was water flowing down the mountain from the calf in the cave.

"Look." Wen Zhuo fished out a patch of red grass in the water. "The Red Twins really flowed out from here."

"Since there is sea water flowing out of here, there must be a connection to the passage, go inside and take a look." I said with some excitement.

The stone wall is cone-shaped, the more we go inside, the narrower and darker, and finally the light of the flashlight in our hands is blocked by a stone wall, which is the deepest place to reach, I have my hand to knock on the stone wall and find that it is not hollow, but I can't find a way out in other places, but since there is sea water gushing out, it means that there must be a passage.

Wen Zhuo stood in front of the blocked stone wall, stretched out his hand and touched it for a long time, and finally picked up a stone and rubbed it on the rock wall, and the moss and rock ash that had been peeled off fell off one after another.

"Come and have a look." Wen Zhuo's voice was full of joy.

We gathered around, and under the light of Wen Zhuo's flashlight, where he had just rubbed, we saw a thin gap, neatly and regularly extending downward.

"Such a regular gap cannot be a natural formation." Yue Qianling also laughed and said to me. "There are obvious signs of artificial polishing on it, and behind this stone wall should be a channel connecting to the sea."

"Yes, you see, there is sea water seeping out of the cracks." Xiao Lianshan dipped some water in the gap and tasted it in his mouth.

I looked up at the stone wall again, it was not much different from the surrounding rocks, it was tightly connected, we tried to push the stone wall hard and found that it was in vain, the stone wall did not move at all.

In this cave, there is nothing but the stone wall, and on the rock wall are countless small holes formed by natural weathering, the size of which can reach into a hand, and from these small holes there is also seawater flowing out, it is not difficult to see that the whole cave is connected with the seawater.

"This stone wall should be to block the passage, since it can be closed, it must be opened, and there should definitely be an opening mechanism in this cave." I looked around and said calmly.

The others heard me say this and searched in the cave, although the cave is not small, but you can see it as far as the eye can see, there is nothing particularly eye-catching, all are natural rocks, Xiao Lianshan's eyes fell on the dense and countless rock holes on the rock wall.

I saw him put his hand in, and suddenly he turned his head in joy and shouted.

"Mechanism, there's an open mechanism here, and I felt a handle."

I hurriedly walked over, Xiao Lianshan retracted his hand, I reached in and touched it, and sure enough, it was a movable handle, and I was about to laugh when I heard Wen Zhuo say next to me.

"I have that here."

I was stunned, let go of my hand and walked over, sure enough, there was also one, I frowned, randomly selected a few rock holes and reached in, the result was the same, there was a movable handle, I asked everyone else to try other rock holes, the result was the same as I thought, there are mechanisms in the dense rock holes on this rock wall.

I just raised my head and looked at the top of the cave, unlike the natural rocks in other places, the rock at the top was obviously smooth, and it was easy to tell if it was installed on a closer look, and only one of these holes could open the rock wall, and I was glad that I didn't have the urge at the time, otherwise I would have pulled the wrong mechanism and the rock on top would have fallen, and all of us would have become a mess of flesh.

"What should I do, there are hundreds of these rock holes, and only one is an open mechanism, how can I try it." Gu Anqi pursed her lips and said with some disappointment. "There will be clues when I encountered the mechanism before, but now there are hundreds of rock holes left, who will know which one is true?"

I took a deep breath and took a few steps back and forth, shaking my head.

"If this is the Fourteenth Mausoleum of the Ming Dynasty, it is not the same as before, Zhu Yuanzhang has not left clues for future emperors, in case later emperors come here, how can Zhu Yuanzhang be sure that they will not choose the wrong one?"

"......," Yue Qianling nodded when she thought about it. That's right, it's not that we didn't leave clues, but we haven't found the clues left by Zhu Yuanzhang. ”

"Zhu Yuanzhang is not stupid, since this is very important to him, he will not leave clues to others in a big way, he will definitely be very hidden." Xiao Lianshan looked around and said weakly. "What's more, this cave is so big, we can't see what he really left behind."

"The clues left by Zhu Yuanzhang...... Wen Zhuo sat alone on the edge of the cave and looked at the mountains, and suddenly said lightly. It's not, if Zhu Yuanzhang really left something, I know one. ”

"What did Zhu Yuanzhang leave behind?"

"Swallow Rock!" Wen Zhuo didn't look back, and casually pointed to the mountain wall next to him and said. "Didn't Fourth Master Zhang say that this mountain is nameless, it is the name given by Zhu Yuanzhang."

We had been down for a long time, and we were all engrossed in thinking about the cave mechanism, and we didn't notice that it was getting late, and a bright moon hung in the sky, and the moonlight sprinkled down on the whole mountain wall as if covered with a layer of brocade.

"That's right, I've been thinking about why Zhu Yuanzhang gave this place a name, and it's called Yanziji, it doesn't look like Yanziji here." I walked to the mouth of the cave and looked back inside, frowning and saying. "And let people engrave the three words of Yanziji on the mountain, what is the purpose?"

"It's not like Swallow Rock here? So what is it like? Xiao Lianshan asked curiously.

"The real swallow rock is located in the suburbs of Jinling on the Zhidu Mountain, abrupt river face, three sides are suspended, overlooking the stone swallow sweeping the river, hence the name, the swallow rock always chokes the big river, the terrain is dangerous, the rocks under the storm beat the stone, surging, the world is called the first rock in the world." Yue Qianling said.

"Jinling's? And still on the river? Xiao Lianshan was even more confused when he heard this. In this way, it really can't be called Swallow Rock here. ”

"It doesn't matter if it's like Yanziji or not, what matters is why Zhu Yuanzhang named this place Yanziji." Gu Anqi said thoughtfully.

"The relationship between Zhu Yuanzhang and Yanziji, I think of one thing." I thought about it and took a deep breath and said. "Zhu Yuanzhang once wrote a poem, and his name was Yongyanziji."

"I know this, it's quite an imposing poem." Yue Qianling took my words and recited them without thinking. "The swallow is a scale, and what about the rainbow as a rod. The crescent moon on the horizon is a fishing hook, and I am said to have a lot of rivers and mountains. ”

"Swallows are on the rocks...... Swallow Rock for the scale! "My eyes lit up and I suddenly raised my head, and there was a low rock at the mouth of the cave, and it looked like a weighing stone when I looked at the mountain from top to bottom.

Wen Zhuo stood up with a confident evil smile on his face, pointing to the bright moon hanging in the sky.

"The crescent moon on the horizon is a fishing hook, and the bright moon hangs the scales! Hehe, I also thought of why Zhu Yuanzhang gave this place the name Yanziji, and the clue he left to open the mechanism is in this poem, if it is the Ming Emperor who came here, how could Taizu's poem not know, and he will definitely think of it when he sees Yanziji. ”

Wen Zhuo and I looked at each other and smiled, turned our heads and said calmly.

"I know where the mechanism to open the stone wall is."

"Where?" Yue Qianling, Gu Anqi and Xiao Lianshan asked in unison.

"Turn off the flashlight in your hands and you'll know." Wen Zhuo smiled nonchalantly.

When the flashlight was turned off, the whole rock wall was pitch black, only the mouth of the cave was illuminated by the moonlight, so I asked everyone to stand on both sides and wait, and the moonlight would naturally tell us where the real mechanism was.

The crescent moon moved slowly in the sky, the whole cave was illuminated, the moonlight shone on the rock like a weighing stone at the entrance of the cave, the long shadow spread to the innermost stone wall, as the moon moved, the shadow also moved slowly on the stone wall, until the shadow on the stone wall and the rock at the entrance of the cave and the crescent moon in the sky became a straight line, just illuminating a rock hole impartially.

I walked over, reached in and held the handle inside steadily, and said confidently.

"This is the mechanism that really unlocks the stone wall."

"For ...... Why would this be? They all asked in surprise.

Wen Zhuo stood by the cave and smiled easily, casually pointing to the crescent moon hanging in the sky.

"The rock hanging at the entrance of this cave is the weighing stone, with the crescent moon as the hook, and Changhong as a rod is actually talking about the shadow that shines down, Zhu Yuanzhang is so imposing, and the moon is called the country, you think about it, if you want to weigh the weight of this scale rod, you must be straightened."

"I see, when the shadow is level with the moon, the rock hole that illuminates is the mechanism that really opens." Yue Qianling smiled excitedly.

"Call me a lot of country." I nodded, watched as everyone took a deep breath and calmly finished speaking, and then pulled down the mechanism in their hands.

With a bang, the heavy rock wall opened.