Along one of the continuous mountain ranges of Planet Macipher, a mountain face was dug out by Han Xiao's machinery to form a cave, and the cave was equipped with a fully automatic environmental shelter, disguised as a rock. In the light of dawn, those outside could not see the existence of the cave, and the energy detection shield blocked out many of the satellite detectors that Sardeem had arranged in outer space, making it impossible for the owner of the planet to discover any energy responses here with just satellites. This area was a blind spot on their radar.
Within the cave was a hollowed-out mountain belly, and Han Xiao had unfolded a portable mechanical fortress there, occupying thousands of square meters. Numerous mechanical foundations were spread across the mountain walls, supporting the hollowed abdomen of the mountain. This area had turned into a stronghold, and the multiple mechanical foundations also served as light sources, illuminating the darkness of the cave.
