Since the locations of firing ports and turrets were designed from the very beginning of the construction of Chen Yu's post-apocalyptic bunker, and the interior was built strictly according to the design blueprints, it had all the necessary supporting facilities except for the weapons and equipment that should be installed. Therefore, he only needed to install the weapons and equipment he had planned in advance.

Chen Yu first casually made up an excuse to send Lin Lele to the animal and plant area on the 16th to 20th floors of the bunker, while he himself walked through the long corridor on the 11th floor and came to the outer area of ​​the living area.

It is worth mentioning that although Chen Yu sealed off the post-apocalyptic bunker for a month, during which time the bunker was managed by an intelligent system, the various plants and animals in the botanical and zoological park were not greatly affected, and the ecosystem reached a balance in a short period of time.

The outer area is located outside the main body of the post-apocalyptic bunker, adjacent to the cliff face of Stone Slab Mountain.

The first thing that catches the eye is a nearly 200-square-meter observation deck. The entire deck is fully enclosed, with windows made of several extra-large pieces of high-strength bulletproof glass that can be opened and closed as needed. Standing by the window, you can overlook the entire Anping city. On ordinary days, sitting here to bask in the weak post-apocalyptic sun and enjoy the scenery is quite pleasant.

On either side of the observation deck are two dark passageways, which are the locations for the external weapon systems.

Chen Yu took out the weapons that needed to be installed from his alternate dimension and neatly arranged them at various firing points in the corridor.

Each side has 5 sets of multi-domain artillery, 2 sets of Phalanx close-in weapon systems, and 20 M240 machine guns. All of these weapons and equipment have been pre-installed with automated operating systems. Once installed in the corresponding positions, they can automatically launch attacks according to defense needs.

Next, Chen Yu returned to the main body of the post-apocalyptic bunker and took the elevator directly to the top of Stone Slab Mountain, where there was also a separate gun emplacement room.

Chen Yu took out 10 sets of multi-domain artillery and 6 sets of Phalanx close-in weapon systems and placed them in their corresponding positions inside.

Next comes the installation and debugging phase, which is the real big project.

After all, it wasn't too difficult for Chen Yu to place these equipment because of the assistance of the extradimensional space, but installation and debugging required manual operation.

Chen Yu called Lin Lele out from the zoo, and the two officially began installing and debugging the equipment.

When Lin Lele saw the series of equipment displayed in the operations room, her understanding was once again shocked. However, after thinking that Chen Yu was originally a member of a national secret department, she felt relieved. The only thing that puzzled her was why all of this equipment was American.

However, with the mission at hand, she didn't dwell on these things too much and excitedly began helping Chen Yu install and debug the equipment.

The two started with the weapons and equipment room at the top, where Chen Yu explained in detail the function and usage of each set of equipment.

Although Lin Lele had received training in the use of these equipment, her talent seemed to lie in piloting fighter jets. She could only be considered to have a basic understanding of how to use these weapon systems, let alone be proficient in their operation, let alone install and debug them. If Chen Yu did not explain it to her clearly beforehand, she was likely to make mistakes during operation.

Next, with Chen Yu as the main person in charge and Lin Lele as the assistant, the two of them spent two whole days installing all the equipment, starting from the turret on the top of the post-apocalyptic bunker.

Looking at the fully armed artillery positions, Chen Yu felt an unprecedented sense of security.

On the summit and slopes of the rocky hill where this post-apocalyptic bunker is located, he installed a total of 20 multi-domain artillery pieces, 10 Phalanx close-in weapon systems, and 20 M240 machine guns.

Weapon system deployment points

Multi-domain artillery can provide long-range fire support in various combat environments, possessing extremely high flexibility and accuracy, and can effectively strike ground, air, and sea targets. It is an important active attack weapon for Chen Yu's doomsday bunker;

The Phalanx Close-In Weapon System (CIWS) is a close-range defense system specifically developed to counter missiles. Its six-barreled 20mm cannon, rate of fire of 3000-4500 rounds per minute, and range of 500-1500 meters enable it to respond quickly and effectively destroy or damage incoming missiles. It is a primary defensive system for bunkers.

As for the M240 machine gun, it is a close-range security weapon for post-apocalyptic bunkers, capable of dealing with rioters attacking in the apocalypse.

Over the past two days, Chen Yu has barely slept. When he finished installing the last M4 machine gun, he was so exhausted that he almost collapsed on the ground. Lin Lele, on the other hand, had gone to the command center to take a nap a few hours earlier under the pretext of debugging the system.

However, while Lin Lele could go to sleep peacefully, Chen Yu could not. The extreme cold apocalypse would arrive this afternoon, and he still needed to check the closure of the Shibanshan Tunnel entrance.

Taking the bunker elevator, Chen Yu arrived at the bottom of Shiban Mountain, passed through the entrance passage, and reached the Shiban Mountain Tunnel.

Looking at the tunnel entrance sealed by reinforced concrete, Chen Yu smiled with satisfaction. His workers were quite efficient, completing such a difficult task in just two days. Moreover, they used high-quality materials; the only gate providing access was made of steel plates more than 10 centimeters thick.

As promised, Chen Yu gave each worker involved in the construction a virtual shopping card worth 10,000 yuan, with a time limit of only three hours. After all, the apocalypse was approaching, and if the workers didn't use the shopping cards by the time the apocalypse arrived, then the shopping cards he gave them would be of little use to them.

After settling things at the tunnel entrance, Chen Yu summoned Li Zheng and other bodyguards, instructing them that their main task for the next period of time would be to lead the Tianyu security team to provide protection for the medical staff of Tianyu Hospital, as well as the engineers of Tianyu Power Plant and Fanfan AI. The reason given was that a global blackout had occurred a few days ago, and things had not been very peaceful during this period.

The apocalypse was approaching, but Chen Yu couldn't tell everyone directly. He could only try to keep his men on their toes through roundabout strategies.

Although his post-apocalyptic bunker is large enough to accommodate hundreds of people, he does not plan to start recruiting people at this time, not even his longest-serving bodyguards like Li Zheng and the top medical staff he has specially recruited.

People tend to cherish what they get most easily. Only after they have witnessed the cruelty and despair of the end times will they feel grateful to those who have extended a helping hand to them.

Therefore, in the early stages of the extremely cold apocalypse, he would not allow anyone to enter his apocalyptic bunker.

As for Lin Lele, it was purely a helpless act due to a series of coincidences. However, he still thought of sending her away after she woke up, even though it seemed like he was abandoning her after using her. But for his own absolute safety, he had to do it.