This protective door is made of a special alloy, extremely hard, and unlocked by facial or fingerprint recognition, all to prevent invasion. Ailina was quite annoyed at her own jinx, just mentioning the need for caution, and danger really came. There wasn't anything especially valuable in the base, but there were many classified documents. Most critically, this was their lair. Initially, Ye Shikai ordered the Ghost to start building the base, from site selection to completion, which took two whole months. It seems they need to prepare to relocate.
Thud.
After a dull sound, the protective door completely shut.
"Lock all the doors leading to the base and activate the defense system," Ailina commanded. Some doors could only be manually closed, but with the protective door blocking, there should be enough time. Automatic guns were set up at corners, identifying enemies through thermal imaging.
Bam bam bam bam.
