The island dawns early, and it dawns at six o'clock in the morning. At six o'clock, Longzi began to fly the drone aerial photography at six o'clock, this kind of work, the day is to do faster than the night, half an hour has been filmed almost, but, just when he was about to finish the retreat, suddenly the signal was cut off, looking at a snowflake on the display, Longzi knew that the drone was shot down by others.

"Start self-destruct and immediately move to another villa next to it, quickly. Ryuko gave the order.

"Ryuko, wouldn't it be too risky to transfer at this time? I think it's better to lurk here silently. Xu San said.

"Okay, start self-destruct first, quickly. Go to the top of the building to keep watch, if the sticks really spot us, we can only wait until the evening to rush out. "Ryuko is not in a hurry, he has prepared a plan before he came in.

All the island's guards were dispatched, but they all flocked around the island, mainly to search the woods on the hills, not expecting the enemy to hide in the empty houses in the villa area.

According to the original plan, if Longzi and they were discovered, Zeng Beiping and they deliberately let the other party discover the yacht to attract the attention of the island. However, it seems that there is no need for this to defend the island at all, focusing on the edge of the island and the surrounding waters.

The island's guards are tossed outside, and Ryuko and Xu San study the video in the basement of the villa, looking for an alternate entrance to the underground research base. They have to find small areas of possible entrances and exits and then sneak in to search.

"According to what Li Youxuan said, the tunnel is about five or six hundred meters long, if calculated according to this distance, with that building as the center, within a radius of five hundred meters, the most likely place to build an underground base is this location, southeast direction, under this sports field at the entrance of the villa area. Ryuko said.

The villa was built on the slope of the hill, and the entrance to the landlord's clothes was a flat area, however, this flat area was built with a sports field, a circular running track, a football field, and a basketball court. For such a small island, which is only two or three kilometers wide, such a flat area is rare, but the designers built a sports field and even a parking lot next to it. Oh my God, what kind of car can an island of a few square kilometers have? Do you need to build a parking lot?

"Well, it seems that there are no three hundred taels of silver here. Xu San said.

"And, look, judging from the architectural layout of the entire island, the sports field here is under the protection of the surrounding buildings. If, if someone attacks the island by force, the target of the attack must be where there are people, and the stadium can be seen at a glance that there is no one, an open space, so even if you throw **, you will not throw this place is not. "Ryuko decided that under this sports field was the research base.

"I agree with you, let's look at an alternate exit for now. Do you think that the alternate exit will also be a few hundred meters away from the underground research base like the usual entrances and exits?" Xu San said as he looked at Long Zi.

"Well, it is very likely that the first function of the alternate entrance and exit is to escape, and in case of emergency, you can quickly escape from the island, that is to say, this entrance and exit should avoid the hot spot area on the island, and if you want to be safe, you have to be quiet. The second function is to secretly transport important, confidential, and non-visible things in normal times. We just need to find out where these two conditions are met, and we basically find this alternate entrance. Ryuko said.

"According to you, this alternate entrance should be in the mountains, in the woods, or in the vicinity of the sea, where there are no houses. Where no one goes, isn't it quiet? Xu San smiled and said, "If you look for it like this, isn't it still necessary to search for it all over the world?"

"Of course not, there are many quiet places, but there aren't many places where you can build entrances and exits. It is not suitable for the south side of the island, which is full of shallows, and the view is too wide, and there is a small sampan on the south side, and the whole island can see it. Whether it is the environment or the architectural needs, the south side is not suitable, and the west side is not suitable for the construction of the dock. It is possible to the east and north, and the woods can also be ....... Ryuko pointed to the video and said.

"Well, what you said makes sense, there are two directions of escape, one is the air and the other is the sea. But this entrance and exit usually has to take on the task of secret materials in and out, so it is impossible in the air, the only thing is the sea. If you go from the sea, this entrance and exit will not be in the woods, and if you are in the woods, you will have to carry secret materials when you want to enter and exit them, which is very troublesome and easy to expose. So, this entrance is only available on the east side, and there is a cliff on the east side, and I suspect that if this entrance exists, then it is under the cliff. Xu San analyzed for a while and said affirmatively.

"However, if it is under the cliff to the east, then it is at least 1,500 meters from the underground base to the edge of this cliff, and even 2,000 meters. Wouldn't it be a big project to drive two kilometers through a rocky tunnel in the mountains?" said Long Zi, pressing his head.

He also agreed with Xu San's analysis in his heart, avoiding the entrance and exit, and it was very likely to be under the cliff in the east. But to open up a tunnel more than 1,000 meters of mountain, this project is not simple, this is not like building an underground base, building an underground base, you can first hollow out in the open air, build the main body below and then backfill, anyway, when it is built, this is just a desert island, no one knows how to do it on the island, no one interferes. But it is not easy to dig a tunnel of more than a kilometer in the hard rocky mountain.

"Since Samson bought this island at a great cost and set up a secret research base here, I believe that he doesn't care about spending a little more money. So, I insisted that the alternate entrance was here, so the cliff to the east was worth exploring at night. Xu San insisted.

"Well, go and explore the cliff at night. In addition, I think there is a chance for a mangrove forest in the southeast, and this one should also be explored. Ryuko nodded and said.

"Since you agree, let's study how we can find out. I like to do things in the most direct way, so I think that touching the top of the mountain and going down directly from the top of the mountain is the safest and most direct way. Xu San put forward his own plan.

Long Zi's brain turned, this method is indeed the most direct and safe way. This is the only way to get to that cliff is the closest. Taking such a route, the chance of meeting other people is also the least, so Longzi agreed with Xu San's suggestion.

"Okay, I'll go with you and Ozu, bring weapons and improvised diving equipment. Before we go down, check the cave halfway up the mountain, and I suspect there's something else going on in the cave.