The mighty Yangtze can swallow the splendor of the Six Dynasties, yet it cannot dissolve the iron and fire that boiled through the eighth year of the Republic.
On a spring-thunder night in 1919, geologist Cheng Yanqiu is swept into a struggle over the Yangtze Hydrological Secret Archives. This map scroll, guarded with his life by a former Qing river commissioner, turns out to mark the arsenal Zhang Zhidong concealed for thirty years. The Jiang'an warlord, foreign warships, and revolutionaries clash in a vortex of steam turbines and bronze crossbow mechanisms. A Green Gang opium boat carrying French bonds sinks, the gears of a German fortress crush a Japanese spy network, and the gun barrel of a female agent who studied in the Soviet Union is engraved with patterns from The Exploitation of the Works of Nature. When Cheng Yanqiu detonates nitroglycerin beneath the river, a hundred thousand tons of water, carrying Hanyang rifles and neon signs, breaks through to reveal the bloodiest answer in a thousand-year-old record of flood control: the dragon vein lies not in mountains and rivers, but in the measuring rod in the hands of those who change the game and measure the world.
