When the fingerprint test is passed, the internal lighting of the elevator leading to the safety room below has been lit up.


    Sun Cheng frowned slightly, but said nothing.


    The elevator is not spacious. It can accommodate up to four people at the same time, and it has to stick the front chest to the back to get off.


    But this is also out of the consideration of concealment. After all, to build a safe house under an already built villa, we have to avoid all kinds of infrastructure in the community and villa, such as underground optical cable, drainage and sewage pipeline, gas floor heating pipeline, etc. the space is naturally limited.


    With revenge, he walked into the not spacious elevator. Sun Cheng looked inside carefully for a while.


    The structure of this elevator is very simple, and there are no fancy things in it. Only the four buttons on the left wall operate the elevator up and down, namely [open door], [close door], [up] and [down].


    He first pressed the door closing button and saw two thin alloy doors ejecting quickly from both sides.


    Immediately after pressing the down button again, sun Cheng immediately felt a slight weight loss. The elevator immediately landed downward. Before he recovered, he had stopped.


    "Although it is only 30 meters away from the ground, ordinary explosives can no longer affect here."


    After pressing the button to open the door, the thin alloy door of the elevator immediately bounced open. It was an empty room that didn''t look very big.


    "Hoo!"


    Xu was used to the Cybertron architecture. When sun Cheng came to this room more than 30 meters underground, which was made of a bright silver alloy from the ground to the wall and then to the ceiling, he suddenly felt a sense of security.


    When the elevator door opened, the lighting on the top of the room was on, so he could see everything in the house clearly.


    The room from the elevator is not big. It is at most five meters long, about four meters wide and about three meters high.


    But the room was empty, not to mention tables, chairs and benches. I couldn''t even see a piece of paper.


    The safe house designed by sun Cheng cannot have such a little space.


    In fact, it is true that the room at the entrance of the elevator is only a quarter of the safe house.


    Without sun Cheng''s command, after entering the room, revenge has come to the other side facing the elevator entrance without making any stop. There is an insignificant single door. Like the elevator entrance, he also needs to verify with his fingerprint or iris to pass.


    The empty room was nothing to see, so he didn''t stay in this room which was only about 20 square meters. He just checked it a little, went to the door, used fingerprint verification again, and entered the second room.


    Like the first room, this room is exactly the same as the previous one in terms of area and construction materials.


    Sun Cheng is not surprised at this, because the two rooms in front of him were specially reserved at the beginning of the design, so that he can win something for him when evacuating when the safe house is exposed.


    Soon he used fingerprint verification again, passed the password door in the second room and entered the third room. After sun Cheng looked around, he stopped satisfactorily.


    The real safe house is here!


    From a human point of view, this is definitely a very spacious room.


    In order to facilitate the construction, the room also adopts the design and construction materials similar to those in front. The overall layout is rectangular, but the area is much larger, about 20 meters long, 10 meters wide and about four meters high.


    Like the two small rooms in front, it is also very empty, but there is not nothing in it.


    In a corner of a space of more than 200 square meters, dozens of large boxes are stacked. In the middle of the safe house, 14 engineering robots of different models are standing there quietly, motionless, as if they had lost energy.


    In the past 20 days, they have built this underground safe house from scratch. They are the engineering robots sun Cheng brought back from the TRANSFORMERS UNIVERSE several times ago.


    In order to keep it as confidential as possible to prevent this safe house from being exposed.


    The earth, bricks and stones and other construction waste excavated during the construction of the safe house were all loaded into boxes by engineering machines, and then taken out and dumped by sun Cheng in a spherical space; All the materials used in the construction were transported by him in the spherical space.


    It can be said that without that magical spherical space, unless he doesn''t care about exposure, he can''t build such a large safe house underground in more than 20 days.


    "Very good, very good!"


    The last time he returned to the real world, although sun Cheng came several times when handling construction waste and transporting materials, at that time, it was still in the initial stage. Even when he came in to transport construction materials for the last time, there was no elevator.


    It was nearly 30 meters away. At that time, he climbed up and down by a nylon ladder, which was also dark. Without the lighting equipment on the engineering robot, he couldn''t see anything.


    So today is the first time sun Cheng saw the true face of the safe house after it was built.


    The space of more than 200 square meters is big enough.


    The safe house is located 30 meters underground, which is impossible for ordinary people to find.


    Sun Cheng has long planned that this place will be used as his real emergency command center for a period of time in the future until the No. 1 base is completely completed.


    Thanks to his lack of security, the safe house has a perfect defense system.


    Its outermost layer is a reinforced concrete layer half a meter later. The reinforcement is all reinforced steel used in the No. 2 base, and even the cement is the composite cement he bought in the real world; Then there is a layer of reinforced alloy plate with a thickness of 20 cm. There are six alloy pillars equipped with shock absorbers in the main space. As long as it is not a large ground penetrating missile or a strong earthquake of magnitude 8 or above in the south, ordinary explosives can not affect it even if they explode directly above.


    The safe house has independent power supply, central air conditioning and perfect ventilation system.


    After some time, after debugging, sun Cheng will allocate several of the latest combat robots just allocated from base 2 before his return to the safe house.


    When he finds time, he will purchase a batch of emergency reserve materials, such as food, drinking water and cans, and store them here. I believe hiding for a few months will not be a problem.