Although the roller coaster kicked up a huge amount of sand and dust after entering the ground, there was no trace of noise, so our action this time was not noticed at all.

After a short shuttle of the roller coaster, I finally saw the huge stone gate! I used the equipment attached to the roller coaster to clear a clearing in front of the stone gate, so that I could have a comprehensive view of the stone gate!

Wu Yingying also got out of the car at this time, and I added a defensive ability shield to my body, but even so, I still didn't let her get close to the stone gate. After all, until I find out what's wrong with this thing, I won't let my wife get into danger!

After observing for a long time, I didn't find any suspicious mechanisms! Hehe, don't forget, I can still see through it, how about a stone door blocking it, I can still see what is inside!

But I was shocked by the result, I felt that after my gaze "shot" on the stone gate, it was actually bounced back!

I tried a few more times, and the result was still the same, I couldn't see through the stone door!

I don't believe that the devils of the island country can build such a powerful door, so biological weapons are nonsense!

I think of what Uncle Wu said at that time, the dead people all have one thing in common, that is, they tried to destroy the stone gate, and those who didn't do it are still alive and well!

In other words, this stone gate can sense the people who are trying to destroy it, and kill these people!

Forget it, I still have confidence in my own body, instead of guessing, I might as well try it myself! Thinking of this, I swung my fist and smashed it towards the stone gate!

And at this moment, I felt a little strange! A very special energy came from the stone gate and hit my body, and for a moment there was a feeling that made my blood gush! But compared to the powerful spiritual energy in my body, this energy was simply the difference between a water drop and the sea, and before it could be done, it was automatically dissolved by the energy of my body!

I quickly tried again, and the result was still the same. And I, now I have finally figured out why those people died! If this kind of blood-pumping energy is added to the body of ordinary people, it is normal for the seven orifices to bleed!

How can this stone door be opened? Obviously, it is not possible to use bombs, and there is no need to think about it, how can such a high-grade thing be effective by bombs! Not to mention that it has been blown up before, and the cave has collapsed, but this stone door is still intact!

"Husband, what is this for?" Just as I was thinking, Wu Yingying suddenly pointed to a small hole under the iron ring on the stone door and asked.

I was stunned for a moment, and looked at the place Wu Yingying said, and sure enough, under the iron ring of the stone gate, there was a very inconspicuous annular small groove!

What is this little groove for? Although I don't know, my perception tells me that it must be useful! Existence is reasonable, and the original designer of the stone gate would definitely not have made a small groove inexplicably!

"Could it be a keyhole? It doesn't seem to be, it's just a small circular groove, and it can't be 'plugged in' into the key!" Wu Yingying said to herself.

But it was Wu Yingying's words that inspired me!

Yes, as long as the door is locked, there should be a key, is this place really a key? I suddenly remembered a Wesley I had seen before, and there was a very classic theory in it! The key is not necessarily the kind that can be "inserted" into the lock cylinder and twisted! It can also be triangular, square, or round!

In that case, why can't it be circular?

Thinking of this, I was like a man in the dark who had caught a ray of light, and I was so excited! I see! To open this door, you must have a special key!

I suddenly thought to myself, if I made a fake key according to the size of the circular groove and put it inside?

I even regret that if I had chased her earlier, she would definitely have become a virtuous helper in my career and life!

Her intelligence and sagacity are innate, and they are definitely revealed by inadvertently!

Wu Yingying cooperated with me to record the size of the grooves one by one, and after all this was done, our work for today was over.

After putting away my things, I didn't drive the roller coaster away again, but directly used an instant transfer back to Wu Yingying's room. Because I had memorized the exact location of the stone gate, I didn't need to use that cumbersome device anymore.

After I came back, I immediately handed over the collected information and data to Xu Qingwei, and asked him to help me build a key that matched the groove.

Since the photos were taken with special equipment, there was no difficulty in making them, and they were completely intelligently "operated", and soon the things were in my hands.

I don't know if there will be any other defenses that can harm the human body after the stone door is opened. The energy on the stone gate is enough for ordinary people to die!

This is also what I have always been very strange, it stands to reason that in a feudal society that has no science, how can such a high-end scientific and technological product appear? I am sure that Sun Sikong can study this kind of thing, but apart from him, the current science in the world will definitely not be able to create such a thing!

So I have to be careful, I don't have a problem, but Wu Yingying can't! As a last resort, I asked Xu Qingwei to help me make a set of temporary defensive armor, due to the hurry of time, the production is not very perfect, but if it is just the kind of energy "sex" attack on the stone gate, it is enough to defend it.

After everything was ready, I asked Wu Yingying to put on a defensive armor, saying that it was armor, but it was actually a kind of outer garment similar to a spacesuit, which was very light and did not affect normal movements at all.

The stone gate is still standing quietly there as it was yesterday. I took out Xu Qingwei's imitation of the "key"!

Wu Yingying and I are very excited! This excitement is like the excitement of someone who is playing a game and is about to clear the level!

Now, Wu Yingying and I care about the fun of opening the stone gate, not how many treasures there are in the stone gate!

I held up the ring-shaped thing, and Wu Yingying's eyes looked at my hand without blinking, as if she was also waiting for this exciting moment!

I slowly put the things in my hand into the groove! I was glad at the same time, but I also sighed secretly, it seems that the scientific level in my test base has reached a very high level!