Espionage: From the Start, I Pick Five from a Hundred Blind Boxes and Crush Japanese Spies

[Republican-era espionage] + [Fully equipped from the start] + [Fear of insufficient firepower] + [Outsmarting the opposition with ease] + [Pure, exhilarating fun]

A modern office worker transmigrates into a book, landing in an espionage novel just as he is about to be sent to the front lines to serve as cannon fodder filling in the trenches.

A hundred god-tier blind boxes give him a full loadout from the start. With an unlimited-supplies workshop at his disposal, he turns around and smashes ten taels of gold on the door of the Military Intelligence Bureau, awakening a death radar and the power to turn back time as he tramples Japanese spies into the dust.

Miniature listening devices, time reversal, penicillin... With overwhelming methods that leave his enemies utterly outclassed, he sweeps through the world of espionage!