I'm a Profiteer in Cold War Germany

In 1961, the Berlin Wall had not yet been built, and an undercurrent was surging in East Germany. Lin Zou, a modern-day corporate drone, transmigrates to the East Berlin Black Market, becoming a heavily indebted gofer. His only cheat is a half-baked intelligence system. The Berlin Crisis is imminent, the Berlin Wall is about to be erected, and the New Economic Reform and opportunities in East and West German trade are coming one after another— He uses his fragmentary memories and reasoning to get ahead of the game: Hoarding goods to cash out, cross-border profiteering, exporting optical instruments, and arbitraging chemical machinery... In the cracks between the Black Market, Stasi surveillance, and the Economic Mutual Aid Committee's trade, he turns the tables and gets rich. From a low-level thug in the Black Market, he climbs all the way up within the Cold War's undercurrent to become the “King of Intelligence” who influences the tide. Until the Stasi comes knocking—they want him to be an even more dangerous pawn... — Description from novelcodex.org