"Bah...bah..."

The interior of the newly dug secret tunnel had not been smoothed yet. When Zhang Tie hunched over and passed by, he lightly rubbed his body, and a small piece of sand fell from the roof of the cave, covering Zhang Tie's head and face.

Dust and some sand even got into Zhang Tie's mouth, causing Zhang Tie to spit them out quickly.

Zhang Tie held a shovel and shovel in his hand. He bent down and touched the end of the narrow secret tunnel excavated yesterday. He half-knelt on the ground with one foot, then pulled down the goggles that protected his eyes and held

As soon as the steel shovel exerted force, the steel shovel was immediately embedded into the hard and thick soil. Zhang Tie used a little force, and a large piece of sand and gravel was dug out by Zhang Tie.

Under the influence of Zhang Tie's terrifying brute force, in just a few minutes, Zhang Tie dug out a piece of soil and sand on the ground of the secret passage in front of him, and the secret passage continued toward the ground.

It extends one meter in the front direction.

Seeing that there was too much sand, gravel, and soil in the secret passage, Zhang Tie put down his steel shovel, took the steel shovel with the handle shortened, and shoveled down more than ten kilograms of soil. Then Zhang Tie thought to himself, and the shovel on the shovel

The soil disappeared instantly and fell into the Chaos Pool of the Black Iron Castle...

Zhang Tie shoveled again, and the contents in the shovel disappeared instantly. He shoveled again, and disappeared again...

After these few days of continuous operation, Zhang Tiegan has become very skilled. At this moment, shoveling the soil and gravel is like a magician performing magic. In just a moment, those who are blocking the secret passage are

Zhang Tie cleaned up the dirt and gravel, and turned them all into the basic energy reserves in the Black Iron Castle.

Zhang Tie moved another meter forward, replaced the shovel with a steel shovel, and continued digging like a groundhog.

With the support of Zhang Tie's terrifying brute strength and physical strength, and the great backup of the Chaos Pool in the Black Iron Castle, the excavated stones and soil are very easy to process, and therefore, Zhang Tie's speed and efficiency are very fast

, often within a few minutes, he could dig out the secret passage to a distance of one or two meters in the direction he was looking for.

The secret passage was so dark that there was no trace of light, but under Zhang Tie's dark vision, none of this was a problem.

A few hours later, Zhang Tie, who was working hard in the secret passage, stopped and listened for a while. The clear sound of running water could be heard from the other side of the secret passage. Zhang Tie was overjoyed.

, continue to dig down with force, moving the shovel like flying.

Ten minutes later, with a crash and the sound of landslides, Zhang Tie, dusting himself with dust, emerged from the secret passage and suddenly appeared in a cave of an underground river in the heart of Yunju Mountain.

This cave is not big, covering an area of ​​only tens of thousands of square meters, and the height of the space is only more than ten meters. The cave is full of twists and turns, with various strange-shaped stalactites and limestones. An underground river five to six meters wide flows through here. Don't rush

It flowed slowly away like this far away.

Facts have proved that in most cases, people's fear comes from the unknown, and the unknown in people's senses is darkness. When people can clearly see their surroundings, their fear will be greatly weakened.

This is Zhang Tie's situation at the moment. If he didn't have the ability of dark vision at this moment, he might still be a little scared in such a strange environment. But at this moment, after seeing the situation of this cave and underground river clearly

, Zhang Tie's mood suddenly became relaxed.

"It seems that Liu Gong really didn't lie to me. According to their geological survey, there is really a huge closed cave and an underground river flowing to Feiyan Lake outside at a depth of more than 100 meters under Jinwu Fort!" Zhang Tiena

Na said to himself.

After a quick inspection of the underground cave, Zhang Tie discovered that the cave was really a confined space in the heart of the mountain. Except for the secret tunnel dug by himself, there were no roads or other entrances to the cave.

After that, Zhang Tie was completely relieved.

After inspecting the cave located in the heart of Yunju Mountain, Zhang Tie then explored the underground river. The water in the underground river was about three or four meters deep. After walking for a while in the cave, it submerged into the heart of the mountain.

After checking the conditions of the cave and the ground river, Zhang Tie silently estimated his location and the location of Feiyan Lake outside. He already had a rough sense of direction and judgment in his mind, and then Zhang Tie jumped to the destination without hesitation.

In the river.

The water in the underground river is very clear. With Zhang Tie's dark vision, Zhang Tie can see the underwater situation clearly even in the water. Zhang Tie's perception is very keen on the speed and changes of the water flow.

Coupled with Zhang Tie's almost unrivaled underwater speed, his ability to breathe underwater almost unlimitedly, and his prediction and understanding of the situation in front of the Dihe River, these factors combined allowed Zhang Tie to dare to jump to the Dihe River.

among.

If it were another person, even a master whose combat power is ten times greater than Zhang Tie and who is proficient in water properties, would not dare to jump into the underground river easily, because no one can say the direction and environment of an underground river.

Unclear things.

You see an underground river exposed in this cave. When you jump in and swim for a while, you may find that there are thousands of kilometers behind. This underground river is like a water pipe buried underwater.

What should I do if I never give you another chance to show my face?

You feel that the water flow here is slow and there seems to be no danger. Maybe you will suddenly discover after swimming a few thousand meters that on the other side of this underground river is a terrifying waterfall leading to an endless underground abyss? Or

Is there an underground vortex with terrifying suction in front of me? Each of these situations can easily kill someone.

Therefore, even if people are good at water, and those who can treat the sea as their own swimming pool, there are not many people who dare to jump into the underground river to swim and play in the water, because compared to the sea, this

The degree of danger hidden deep in underground waterways is truly unpredictable.

After swimming in the Dihe River for a short period of time, Zhang Tie found that the road in front of him suddenly split into two. The waterway in front seemed to lead to Feiyan Lake, while the other waterway seemed to lead to Bailong Town.

direction.

Zhang Tie first chose the waterway leading to Feiyan Lake and swam across it. The distance of five to six hundred meters was only a short time for Zhang Tie. The closer he got to Feiyan Lake, the narrower the waterway in front of the Dihe River and the slower the water flow.

It gradually slowed down, from five or six meters wide to only two or three meters wide. The narrowest section was between two huge stones, with a width of less than one meter, but fortunately it did not affect Zhang Tie's ability to swim across.

The light suddenly brightened in front of his eyes. Zhang Tie looked up and found that he had swam out of the Dihe River. More than 20 meters above his head was the water surface of Feiyan Lake. The place where the Dihe River connected Feiyan Lake was where Feiyan Lake was.

Yan Lake is close to the bottom of the lake on this side of Yunju Mountain. Because the terrain here has flattened, the water flow here has slowed down to the point where it is difficult for people to notice.

The bottom of Feiyan Lake is covered with lush green water plants and patches of rocks. The entrance of the cave connecting Dihe River and Feiyan Lake is among the water plants and rocks. It is very hidden unless you are a guard.

At the entrance of this cave, otherwise you would never see anyone swimming out of this cave.

A group of small fish with long fingers swam among the water plants. The lake surface above their heads was sparkling, like a beating and burning golden flame. Zhang Tie suddenly popped up with a head from the stones and water plants, scaring the small fish.

After running around, Zhang Tie took a look and saw a small boat floating there on the lake, more than 300 meters away from him.

Looking up from the water, the semicircular bottom of the boat can be clearly seen.

This was not the time to float up. Zhang Tie, who had clearly seen his surroundings, turned around in the water like a fish and swam up again from the hole at the bottom of the lake. He swam back to the fork five to six hundred meters upstream.

When he reached the entrance, Zhang Tie thought about it and swam directly to the waterway leading to Bailong Town.

A few minutes later, Zhang Tie exposed his head from a bright surface of water and took two deep breaths of fresh air. Just as Zhang Tie raised his head and looked at the bright light above, he felt that the shape of the hole was a bit strange.

The dark object suddenly fell from above. If Zhang Tie hadn't acted quickly and quickly, the dark object would have almost hit Zhang Tie's head.

Zhang Tie was startled and looked at it. Damn it, it was a bucket. Zhang Tie suddenly guessed where he was.

"Happy, you lazy guy, you are here to sleep around at dusk again, right? Have you picked up the water in the water tank in the back garden? Xiaohe and the maids are still waiting. The flowers raised by the master will be watered sooner or later.

Water once, if it's delayed, I won't break your legs, you bitch..." A domineering voice came from above.

"Haha, Butler Zhao, how can I sleep? Look, am I fetching water?" A flattering voice sounded. As the voice sounded, the wooden barrel shaking in front of Zhang Tie's head tilted and sank.

It was filled with water all of a sudden and was pulled up by the rope.

"Don't think I didn't see it. You clearly moved when you saw me coming. You were just lazy. This month, the monthly reward from the master will be halved for you!" The voice called Zhao Guanjia shouted coldly, and he had already left.

Arrived at the well.

"No, Butler Zhao, once my monthly payment is halved, I will be in a bad mood. When I'm in a bad mood, I like to drink to drown my sorrows. When I drink to drown my sorrows, I can't hide my troubles. What if

I was drunk, so I would be embarrassed to tell anyone about some of the things I saw a few nights ago!"

"What do you mean?"

Wanfu's voice suddenly became softer and more mysterious.

"I drank too much the night before yesterday and got up in the middle of the night to go to the hut. I felt dizzy and couldn't find a place in the dark. Then I took a pee on the rockery in the back garden. I happened to see you and Mrs. Zhao, Butler, in the room.

Xiaohong is in the cave of the rockery, hey... hey... Butler Zhao is really in good physical condition!"

"Cough...cough..." Butler Zhao coughed violently, "Wish you, you are too honest. There are so many jobs in the house that you can't do alone. Today, you will start with the back garden.

Just fill the water tank with water. You have a day off tomorrow, and I will give you five more silver coins in your monthly payment. Work hard, and the diligent master will see it!"

"Thank you, Mr. Zhao!"

…

After hearing this, Zhang Tie cursed secretly and dived into the water again.

…

A few minutes later, Zhang Tie swam back along the underground river to the cave in the heart of Yunju Mountain. Although it was almost impossible for anyone to come to this place, Zhang Tie still made some efforts to cover up the entrance of the cave he dug.

He disguised himself, found a big stone to cover the entrance of the cave, and then followed the newly dug secret passage to a secret room.

The size and layout of this secret room are somewhat similar to the one Tang De left in Black Flame City. It is only more than 200 square meters in total. There are steps leading to the top. There are several thousand-year-old fluorite lamps in the secret room.

There are some simple supplies placed there. This place is where Zhang Tie is nominally used for retreat and practice in Jinwu Castle.

Zhang Tie, who climbed up from the secret passage, grabbed the heavy bluestone floor weighing more than 300 kilograms with both hands, put the bluestone floor back to its original position lightly, and placed a table on the stone slab.

In the secret room, others can no longer see anything strange.

There is also a secret passage in the castle, which connects Zhang Tie's bedroom and study. Through that secret passage, Zhang Tie can quietly run from the underground to the place outside the castle, near the airship landing site.

That secret passage was built by the Changfeng Merchant Group when they built the castle. After encountering Liu Xiang's betrayal, Zhang Tie knew very well that the secret passage had actually lost its effect on him.

Something that more than two people know cannot be called a secret, let alone more than two people who know that the secret passage exists. People in the Changfeng Merchant Group who participated in the construction of the secret passage and the design of the castle drawings definitely know that there is such a thing. These people

If they all know, then those people hiding in the Changfeng Merchant Group and Huaiyuantang who want to plot against themselves are likely to already know.

Maybe right now, on Qianlong Island, there is someone responsible for monitoring the secret passage with a telescope every day.

Of course Zhang Tie would not base the success or failure of his plan and the secrets on an exposed secret passage, so in the past few days after returning to Huaiyuantang, Zhang Tie spent a long time in this secret room every day in the name of seclusion and practice.
To be continued...