The relative distance between the groundwater level and the bunker changes, so it is necessary to shorten the pumping pipes and sewage pipes.
The snow melter extending 10 meters from the bunker to the ground is no longer usable; it needs to be cut off and the gap sealed.
The same applies to the cylindrical staircase passageway leading from the Imperial Villa to the Bunker;
The signal transceiver, which also extends 10 meters to the ground, needs to be extended.
While hiding is necessary, we must not miss any outside information.
However, to prevent reverse tracking and maintain secrecy, the signal transceiver must be installed at a very far distance.
Ideally, it should be extended 13 kilometers directly and placed near the outskirts of Phonghai City.
This means that a long, narrow tunnel needs to be dug to extend the signal fiber optic cable and power line.
This added a lot more to the workload.
Finally, we need to consider air circulation and emergency escape procedures.
Even though Liu Kai planned to set up a teleportation portal, the traditional passage was undoubtedly the safest option.
Therefore, the bunker's original heavy and ingenious combination lock door was also to be preserved.
Let's start from this gate.
They dug a tunnel diagonally upwards to reach the surface.
The passage is 370 meters long and 1.5 meters in diameter, only wide enough for one person to squeeze through and escape.
This escape route also serves as a conduit for air circulation between the underground fortress and the outside environment.
At the same time, Liu Kai plans to dig the exit channel into a bend shape that first goes upwards and then downwards.
It can effectively prevent snow accumulation and rainstorm backflow, and also prevent dead branches and leaves from falling in and causing blockages.
The location of the passage's exit is also cleverly chosen.
Located directly west of the underground fortress, atop a nearly vertical, steep cliff.
This is the famous cliff view of Fenghai City: Zhaixing Rock.
The exit is nearly 200 meters above the ground.
As an emergency escape route, it requires survivors to wear parachutes to escape.
After digging an opening in the cliff, you can use stainless steel sheets that match the color of the rock face to block it for camouflage.
Continue read on readnovelmtl.com