The battle armor operates very flexibly, allowing Yan Fei to swim quickly in the deep sea like a fish. However, Yan Fei still felt many discomforts inside, primarily due to the battle armor's weak radar detection power, which was completely unusable in the deep sea.
Having lost the ability to scan the surroundings like the Drone Quantum Radar, Yan Fei felt like a blind person, potentially bumping into obstacles at any time. Luckily, he was always connected to the Auxiliary Brain, which had projected a 3D Map of the core remnants into his mind, marking Yan Fei's location and his direction of advancement. As long as Yan Fei followed this arrow, he could enter the key area of the core remnants.
