Minsheng Shipping split the Yangtze route to beat the Japanese deadline

In October 1938, with Wuhan already fallen to Japanese forces and an invasion of the river port of Yichang expected within roughly 40 days, China's war effort faced a single chokepoint: virtually all the industrial machinery, munitions equipment and refugees fleeing the war zone had to pass through Yichang and up the Yangtze's Three Gorges to reach the wartime capital, Chongqing, and there was no other route out.

The straightforward plan — load whichever ship was available, send it the full distance from Yichang to Chongqing, unload, repeat — wasted a boat's most valuable hours on stretches of river it wasn't suited for. Modern steamships were fast in open water but couldn't navigate the shallow, rapid-choked stretches nearer Chongqing that smaller wooden craft handled easily, and every hour a large steamer spent idle at a dock being loaded was an hour it moved nothing at all.

Split the route into three segments, matching each vessel to its suited stretch, and loaded at night while ships ran by day, cutting a year's work to 40 days.

Large steamers wasted time on shallow rapids; wooden boats couldn't use open water, so matching each to its segment raised efficiency.

Segments ran in parallel, so total throughput rose without adding ships.

Night loading and day transit kept vessels moving, cutting idle time.

Requisitioning 2,000 wooden boats provided the needed specialized capacity.

When one route is the bottleneck, don't run everything end-to-end; segment by physical constraints and assign specialized equipment to each segment.

Over 40 days from late October to early December 1938, the operation moved more than 30,000 people and over 100,000 tons of equipment and supplies from Yichang to Chongqing, under intermittent Japanese aerial bombardment; Minsheng Company itself lost 16 ships and 116 employees killed, with 61 more disabled, in the effort. 5 million people and over a million tons of cargo upriver in total. C.