How Could I Be Invincible With One Hand?

How Could I Be Invincible With One Hand? Plot:

Former boxing legend Lu Chen returns to the ring with a bionic left arm after losing his right hand in an accident, challenging the reigning ten-time champion. Dismissed as a "one-handed cripple," he shocks the world by KO'ing his opponent in three seconds. Medical scans reveal his right arm nerves were long dead, yet his left arm registers beyond human limits. His ex-coach discovers CCTV footage of Lu punching through concrete walls at midnight, glowing circuitry pulsing under his skin. "That accident was no coincidence," warns the medical AI, "his latest diagnostics report...is forged." The invincible left hook hides a terrifying secret that could shatter the entire sports world.