National Fate: A Milk Deliveryman’s Rise to Global Capital Mogul

In the age of global business warfare, the Dragon Kingdom and the Eagle Kingdom vie for dominance of Earth. Li Xiaofeng carries the fate of his nation on his shoulders. Starting out as a milk deliveryman, he “accidentally” obtains a game card awakening System and is drawn into a dream, where he arrives in the [Abyss] world. By leveling up through the System, he continually unlocks the strongest business and combat skills, gradually becoming the top figure in the Dragon Kingdom's financial world and leading its capital forces into a showdown with the Eagle Kingdom's Wall Street.

At the crucial moment of the decisive battle, Li Xiaofeng is brought under the control of the [Abyss] organization and turns against his own side. It turns out he is a Dragon Kingdom clone created by the Eagle Kingdom to defeat the Dragon Kingdom, and his rapid growth was deliberately engineered by the Eagle Kingdom's [Abyss] organization. Who exactly is Number Zero Li Xiaofeng, and where is he? What will become of the Dragon Kingdom's national fate...

(Urban high martial arts + supernatural abilities + workplace + business warfare + System + national fate + a touch of sci-fi. The worldbuilding is extensive, and the story unfolds gradually at a steady pace. Readers who mind that should proceed with caution.)