Ye Chengzhong proved his honesty by returning a lost briefcase

In the 1850s, the Huangpu River anchorage in Shanghai was crowded with foreign trading ships, and poor local youths made a living rowing small sampans out to peddle goods and run errands for the crews. Ye Chengzhong, orphaned young and from a poor farming family near Ningbo, was one of these peddlers by around age 17; he had scraped together only a single yuan toward the cost of learning English, a measure of how little he had to lose and how much a windfall would have meant to him.

The foreign merchants he served had no way to check his background, no shared language to build rapport in, and every reason, given the era's assumptions about Chinese dockside peddlers, to expect a poor teenager left alone with valuables would simply take them. There was no institutional way for Ye to prove otherwise in advance; the only test available was whatever happened the one time it actually mattered.

When a foreign trading-house manager left a briefcase in Ye's boat containing business documents along with several thousand dollars and pounds in cash, Ye did not open it, keep it, or disappear, he waited through the afternoon until the merchant came looking for it, returned the briefcase intact, and declined the large reward the merchant offered him.

Returned a briefcase full of cash intact and refused the reward, making his honesty costly and verifiable, which a self-interested cheat would never rationally do.

The act was costly and unrecoverable, so it couldn't be faked cheaply.

A cheat would have kept the untraceable cash, so returning it was convincing evidence.

The merchant witnessed the act directly, converting suspicion into trust in one moment.

That trust led to concrete help, founding Shunji Hardware and a trading empire.

When facing distrust across a status gap, take a costly, verifiable action that a self-interested cheat would not take, rather than trying to argue your trustworthiness.

The merchant, convinced of Ye's character, helped set him up in the hardware trade, and in 1862 Ye opened Shunji Hardware and Miscellaneous Goods (顺记五金洋杂货店) in Shanghai, the city's first hardware trading house owned outright by a Chinese merchant, dealing in ship hardware and kerosene. Shunji expanded into further branches under names like Xin Shunji and Kechi Shunji across Shanghai and into treaty ports including Hankou, Jiujiang, Wuhu, Zhenjiang, Tianjin, Yingkou, Yantai, Ningbo, and Wenzhou, and Ye became known as China's 'Hardware King.'