Ding Xiaoding immediately stopped, turned his head, and looked at Hong Feifan questioningly.

Hong Feifan said with a serious expression: "You hurry back and close the door of the barbed wire." ”

"Why?" Ding Xiaoding said incomprehensibly.

"Put the wire gateway in place first, and I'll tell you the reason later. Hong Feifan urged.

Ding Xiaoding stopped asking questions and returned with doubts.

He put the wire gateway in place and hooked the lock to Qu Xu'er, but he didn't lock it, so as not to open it inconveniently when retreating from here.

Ding Xiaoding closed the barbed wire, turned around, and walked back to Hong Feifan's side.

"Done?" asked Hong Feifan.

"That's it!" Ding Xiaoding nodded.

Hong Feifan hummed and said, "I suddenly felt that the barbed wire fence was not stopping people, it should be those sea fish." ”

"Why do you think so?" Ding Xiaoding looked at Hong Feifan and asked.

"Didn't the information we got earlier say that there were mines in the sewers?" said Hong Feifan.

"That's right. Ding Xiaoding nodded.

"If our information is accurate, then if we go further inside, we may run into mines. Hong Feifan analyzed, "The barbed wire fence just now should have been set up to prevent those relatively large sea fish from swimming in and touching the mines. ”

Ding Xiaoding nodded thoughtfully and said, "You have a point!"

"I heard what you said. At this time, Yu Xiadi's voice came from Hong Feifan and Ding Xiaoding's ears, "Brother Hong's analysis is correct, there may really be mines in it." Next, you have to be more careful. ”

Hong Feifan and Ding Xiaoding both said "um".

After walking two or three meters inside, Hong Feifan and Ding Xiaoding suddenly stopped.

"Did you see that?" Hong Feifan said first.

"Yes, I saw it. Ding Xiaoding answered.

"What do you see?" said Yu Xiadi's questioning voice in their ears.

"Mines. Hong Feifan responded.

"Are there really mines?" Yu Xiadi asked.

"Yes. Hong Feifan said, "Under the water of about two meters for me and Xiao Ding, there are several mines the size of sugar oranges. ”

"Fortunately, I wore these glasses, otherwise it would not have been easy to find. Ding Xiaoding exhaled and said.

"You guys come closer, I want to see what these mines look like?" Yu Xiadi said.

Hong Feifan and Ding Xiaoding took two small steps forward.

The glasses they wore also had the function of shooting, and Yu Xiadi on the coast saw those mines through the images transmitted back by the glasses they were wearing.

Those mines were the size of sugar oranges, and their bodies were dark blue. There are several tentacles on the surface of mines, and as long as someone touches the tentacles of these mines, the chemicals in the tentacles will become a chemical battery to detonate the mines.

Such mines are small and are specifically aimed at people. Of course, if a larger fish touches it, it will explode.

For those slap-sized fish or smaller fish and shrimp, it is not a threat.

The water in the sewer is so turbid that if it weren't for such special glasses, it would not be easy for ordinary people to detect mines with the naked eye alone.

"Be careful, these mines will explode when touched. Yu Xiadi reminded.

"Understood. Hong Feifan said.

He certainly knew the role and hazards of these mines.

"Fortunately, Brother Hong told me to put that wire gateway on just now, otherwise, if we let those sharks outside, we will touch these mines, and then we will be exposed. Ding Xiaoding sighed.

"That's right. Yu Xiadi said, "You thief is not careful enough, if it weren't for Brother Hong, I guess you would have been exposed." ”

Ding Xiaoding shrugged and smiled.

"Alright, let's keep walking. Hong Feifan said.

With that, he moved his body forward slowly, carefully avoiding the mines.

Ding Xiaoding followed closely and successfully avoided the mines.

After avoiding the mine belt, they walked forward three or four meters, turned a corner, and suddenly saw a faint light reflected in the water not far ahead.

Hong Feifan and Ding Xiaoding looked at each other and cautiously walked towards the bright light.

As you go forward, the light gets brighter and brighter.

They walked out into the light and looked up to see the grate above the sewer.

It was through the grate that the light came in.

After Hong Feifan glanced around, he said to Yu Xiadi: "Adi, we have reached the entrance of the sewer, is there anyone outside the entrance?"

"No one. Yu Xiadi quickly responded.

Through the intrusion surveillance system, he could see most of the inside of the castle.

Wherever there is a camera, he can basically see it.

Hong Feifan said "yes", took off a waterproof backpack behind his back, and took out a gun and a bundle of safety ropes from it.

Strictly speaking, this is not a gun, but a hook gun.

This hook gun is similar to the hook gun used by Batman.

Hong Feifan carried the backpack in front of him, and then put the safety rope on his body.

After securing the safety rope, he raised his hook gun, aimed it at the iron grate above, and pulled the trigger.

With a "whoosh", a rope shot out of the clawhook gun. The hook at the other end of the rope then hooked tightly onto the grate.

Hong Feifan pressed the other switch on the hook gun, and the gun pulled the hook back and automatically pulled Hong Feifan up through the reaction force.

Hong Feifan grabbed the iron grate with one hand and tied the other end of the safety rope to the iron grate with the other.

At this time, he hung under the iron grate, and even if he didn't have to grasp other objects with both hands, he wouldn't fall down.

With all this done, he pulled out a miniature rechargeable electric drill from the backpack he was carrying in front of him.

He drilled three small holes in the side of the grate with the drill bit of the electric drill, and then took out three explosive screws and a hammer from his backpack.

Three explosive screws with a screw at one end and a ring at the other.

With a hammer, he hammered three explosive screws into three small holes.

After putting the hammer away, Hong Feifan grabbed the iron grate with one hand, untied the safety rope tied to the iron grate with the other, and then tied the other end of the safety rope to the ring of the three explosive screws.

Hong Feifan let go of his hand grasping the iron grate and hung in the air again.

Ding Xiaoding raised his head and watched below.

Seeing that Hong Feifan was able to do those things perfectly in such a difficult environment, even if he was not necessarily so easy to do well, he couldn't help but admire it sincerely.

Hong Feifan grabbed the iron grate with both hands, and was about to push the iron grate away with force, when Yu Xiadi's voice suddenly sounded in his ears: "Attention, there are security guards patrolling outside the sewers." ”

Hong Feifan let out a soft "um", let go of his hand, and held his breath.

Ding Xiaoding, who was standing in the water, immediately flashed to the side.

Soon, Hong Feifan heard footsteps.

Hong Feifan felt the footsteps suddenly stop about two meters from the entrance to the sewer.

(End of chapter)