Humanity's love affair with exoskeleton technology went back a long way.
Mechanical prostheses could provide an individual inhuman speed and strength, but other than the disabled or human modification fanatics, most ordinary people weren't about to remove a part of their bodies and replace them with some mechanical part, even if their mechanical ears could automatically play "Symphony No. 5 in C minor," and wake them up on time every morning.
Thus, exoskeleton wearables became the first choice in the ingredients of building super fighters. From where Zhang Heng came from, the militaries of various countries had already mooted studying exoskeleton technology. And in this quest, the exoskeleton was mass-produced and widely used by the military.