Standing on the rocks by the sea, you can see that the gorgeous morning glow reflects most of the sky on the sea.

The islands of all sizes standing in the sea are covered with a mysterious halo against the backdrop of the morning glow.

Among the islands of different shapes, Heizhu Island stands particularly tall and tall. Visually inspect its distance from the coast, which is about a little over a nautical mile.

Li Dai rented a fishing boat from local fishermen. A group of eleven people prepared to pretend to be fishermen, approached Heizhu Island, observed the sea conditions around Heizhu Island in detail, and then chose the opportunity to choose how to seize Heizhu Island.

Everything was ready, Hua Xianzu, Du Heng, Li Dai and others boarded the fishing boat and sailed towards Heizhu Island.

In order to avoid being discovered by the Japanese army on the island, only Hua Xianzu, Li Dai, Che Fanyou, Clairvoyant and the owner of the ship were left on the ship. All five of them were dressed as fishermen, pretending to be fishing while driving the boat. The rest of the people were all hiding in the cabins.

In fact, Hua Xianzu and Li Dai both carried clairvoyant mirrors for television in their bags, but under the current situation, it was inconvenient to use them, so they could only rely on the outstanding eyesight of clairvoyance to observe the situation on Heizhu Island.

"Clairvoyant, take a good look at the situation on Heizhu Island." Hua Ancestor commanded to the clairvoyant.

"Okay, Commander." Clairvoyant agreed, lying on the boat and taking a closer look in the direction of Heizhu Island.

In order to prevent his dark skin from attracting the attention of the island's enemies, Clairvoyant specially wrapped his entire head and face around a rag, leaving only a slit in his eye.

From afar, countless petrels flew and circled around Heizhu Island. A tall watchtower stands on one of the highest heights on Black Bamboo Island. There are Japanese soldiers standing guard in the tower.

In the morning light, a faint layer of mist floated on the cliffs around Heizhu Island. Through the mist, a petrel can be seen taking food in its mouth, landing lightly in front of a gap in the cliff rock, burrowing into the gap, it seems that it wants to use the food in its mouth to feed the young swallow waiting to be fed.

A ferocious short-eared owl flew from a distance and landed gently outside the crevice that the petrel had just burrowed into, quietly waiting for its prey to emerge from the gap.

After a while, the petrel that had burrowed into the nest to feed came out of the crevice of the cliff again. Seeing this opportunity, the short-eared owl that was waiting outside the crack rushed to its feet, and with its sharp claws, held down the petrel that was about to fly up the cliff, and then, bowing its head, pecked at it with its long hooked beak.

At this moment, from the light mist not far away, another short-eared owl suddenly flew in, and it swooped down on the same kind of person that was pecking, trying to snatch the food from the other's mouth.

When the short-eared owl was pecking, it immediately picked up its uneaten prey and fled into the distance with its wings. The short-eared owl, which flew to prey for food, followed closely behind.

"Report to Commander Hua, this cliff is full of nests of petrels, and there is no place to cling to."

The fishing boat carried everyone, separated by a certain distance, around Heizhu Island. Clairvoyant widened his fiery eyes, carefully observing the corners and corners of the cliffs and rocks on Heizhu Island, and did not miss a single detail. In the end, however, no route to the island was found.

"If only Shi Lang were here." Looking at the steep and upright Black Bamboo Island, the ancestor of Hua was a little helpless.

"Why don't we negotiate in the cabin?" Li Dai saw that Ancestor Hua looked worried, and hurriedly suggested.

"Okay." After Hua Xianzu finished speaking, he went down to the cabin with Li Dai, Che Fanyou, and Claireye.

"This is strange, how did the Japanese people get there?" After listening to Ancestor Hua's introduction to the situation on the island, Du Heng contemplated and was puzzled.

"Do these Japanese people have some advanced climbing tools?" Li Dai spoke.

"This is impossible, in the country of the Wa, if you want to talk about climbing skills, of course, the ninjas of the Wa Kingdom are the most powerful, but the tools they use to climb are nothing more than kunai, flying tiger claws, etc., which are almost no different from the climbing tools used by our Daming Jinyiwei. It's okay to use tools like kunai and flying tiger claws to climb city walls and tall buildings, but it's almost impossible to use them to climb this black bamboo island. Hua Xianzu denied Li Dai's speculation.

"Yes, last night I was at Qingyunguan with Brother Du, and when we climbed up from under the culvert, I already understood the difficulty of climbing." Li Dai was deeply touched.

"Hey, culverts? Let's think about it, under the sea water of this Black Bamboo Island, will there be any caves and other passages that can lead to Black Bamboo Island. Du Heng was inspired by Li Dai's words.

"yes, why didn't we think of that!" After Li Dai listened to Du Heng's words, he suddenly opened his mouth, and he slapped his thigh excitedly, but he didn't expect it to be slapped on the right leg of Che Fan, who was sitting next to him.

"Ouch, it hurts me!" Li Dai used too much force, and the right side of Che Fan who was slapped grinned in pain.

"Hahaha!" Looking at Che Fanyou's somewhat exaggerated painful expression, everyone couldn't help but be happy.

"Okay, don't hesitate, act now. Everyone quietly entered the water from the side of the boat with their backs to Heizhu Island, dived over, and approached Heizhu Island to see if there were any caves in the sea below the island. General Li and Du Heng can see the opportunity. My brother and I are always ready to pick you up on this boat. Hua Xianzu felt that Du Heng's speculation was not unreasonable, and it was worth a try, so he gave an order.

Taking advantage of the opportunity when the fishing boat was facing Heizhu Island horizontally, Du Heng, Li Dai, Clairvoyant, Shunfeng Er, and Li Dai selected five soldiers with better water skills from the navy, quietly turned their backs from the boat to the side of Heizhu Island, and descended into the sea water in turn. Then, Du Heng and Li Dai took the lead and swam towards Heizhu Island.

After swimming for about a quarter of an hour, Du Heng took the lead in touching the cliff at the bottom of Heizhu Island with his hands, and he kicked his legs hard to bring his body to the surface. Li Dai and others have also surfaced one after another.

Since several people were already clinging to Heizhu Island, the Japanese soldiers on the island could not see them at all.

After a simple gesture exchange, the nine people did a division of labor, Du Heng led the clairvoyant and the wind ear, clockwise around the island to observe; Li Dai led his five brothers to search counterclockwise in opposite directions, so as to circle the island at a faster speed to see if there were caves or other passages at the bottom or under the water of the Black Bamboo Island.

Ten minutes later, the two groups met on the other side of the island. The results were disappointing, no caves were found.

"Brother Du, when I swam to the southeast of the island, I noticed that the sea water in that place was a little strange." Clairvoyant whispered to Du Heng.

"Tell me about it." Du Heng urged clairvoyance.

"The water about ten meters away from this island in that place looks like there is a swirling current, and I wonder if there will be a cave down there." Clairvoyant said.

"Oh, why didn't you say it earlier." Du Heng looked a little impatient. He hurriedly used gestures to communicate with Li Dai. Then, together with Li Dai, he led everyone to swim to the southeast of the island.

Coming to the southeast corner of the island, Clairvoyant pointed to the sea ten meters away and said, "That's the place, underwater." ”

Du Heng waved his hand, and all the people immediately followed him into the bottom of the water and swam underwater to the place pointed by the clairvoyant.

After swimming to the destination, everyone fixed their eyes and saw that there was a fault zone on the coral reef at the bottom of the sea, and below the fracture was a huge ocean trench.

Everyone swims to the edge of the trench and looks down, the bottom of the trench is unfathomable, the sea water in the trench is clear and transparent, and you can clearly see the V-shaped step-shaped landform on both sides of the trench, and some unknown marine fish swim freely in it.

Clairvoyant gestured in the direction of the right side of his body. Everyone stabilized their bodies underwater and looked at the fact that there was a not-so-obvious whirlpool in the trench about five meters in front of the right. A group of colorful deep-sea swimming fish are swimming around with the whirlpool and frolicking.

Du Heng motioned for everyone to join him and dive down along the water whirlpool. Li Dai understood, he waved his hand, and led his subordinates, together with clairvoyance and Shunfeng Er, to follow behind Du Heng and swim towards the depths of the trench.

After diving down for more than ten meters, a semicircular hole appeared on the steep wall of the trench. The water in the whirlpool flows inward along the mouth of the cave.

Du Heng turned around and waved to everyone, signaling to follow him into the cave. Li Dai and the others caught up and, together with Du Heng, swam forward.

The water inside the cave is much cooler than outside. But the visibility inside the cave is not low, because there are a large number of glowing jellyfish floating in the sea water inside the cave.

Groups of various sea fish swim head-on in the direction of everyone's swimming, and when they are about to collide with everyone, they quickly avoid everyone and swim over in panic from both sides of everyone's body.

After diving for nearly twenty meters, a smaller hole appeared on the stone wall on the right side of the cave, and a bright light appeared in front of the left. Based on the sensations of his body, Du Heng judged that the seawater in the cave was flowing towards the bright place.

Under Du Heng's command, everyone swam towards the place where there was light. After a while, he swam to the other end of this underwater cave. When they swam out of the hole, they realized that they were in another section of the winding trench.

Du Heng still didn't give up, he turned around and joined Li Dai, and led everyone to swim back into the cave and swim towards the smaller cave entrance he had just discovered.

The diameter of this smaller cave is about two meters, and the sea water in the cave is still depending on the direction of the seawater.

Du Heng and Li Dai did not hesitate, and the two of them swam towards the cave at the same time. The seven men behind followed closely.

After swimming into the cave for less than two minutes, the cave in front of me suddenly opened up and brightened. It was as if everyone had swam into a big pool.

Du Heng and Li Dai touched the rocks by the pool, slowly revealing the water. The cave was pitch black.

Du Heng and Li Dai wiped a handful of seawater from their faces with their hands so that their eyes could first adjust to the environment inside the cave. Then, look around alertly. Seeing that there was no danger around, the two motioned for the others under the water to come out of the water.

It is a large cave with a height of about three or four meters from the surface of the water to the top of the cave. The roof of the cave is covered with canine-like stalactites, large and small. Three meters away on the opposite side is the edge of the pool, where several huge pebbles-like rocks are arranged irregularly on the shore.

Du Heng led everyone to swim gently to the shore and climb onto the pebbles on the shore.

There is an open area in front of you, and there are several circular puddles scattered on the uneven rocky ground, and every once in a while, from the bottom of the puddles, there will be jets of water of different heights at the same time, which indicates that these puddles are connected to the sea water outside, and under the surging waves, they will spew out a thousand kinds of water jets from time to time.

At the other end of the open area is a cave. Everyone didn't dare to stay, followed Du Heng and Li Dai, carefully walked through the open area, and entered the cave.

The cave is dimly lit. The rocks beneath your feet gradually become steeper, indicating that you are walking in a cave that slopes upwards. As you go up, the space inside the cave becomes smaller and smaller. Everyone had to use their hands and feet together, and continued to climb up the irregular steps in the cave.

Judging from the direction of the route, Du Heng felt that everyone had entered a cave inside the rock mass of Heizhu Island, and he couldn't help but be secretly surprised: it seems that the secret passage to board this Black Bamboo Island has finally been discovered!