A subdistrict of 76,000 people, laid out in the shape of a sock, makes about a third of all the socks on Earth — some 27 billion pairs a year. It is the block economy in its purest, most single-minded form.
Datang is a subdistrict of Zhuji, in Shaoxing, Zhejiang — small enough that barely 76,000 people live there, and so devoted to one product that its streets were deliberately planned in the outline of a sock. From this single town comes roughly a third of all the socks worn on the planet: on the order of 27 billion pairs a year, about seventy percent of China's entire output, more than three pairs for every human alive. The world calls it, without much exaggeration, the sock capital of the world.
The beginning is almost folkloric. At the end of the 1970s, when private side-work was still risky under the collective system, Datang's farmers worked the production team by day and quietly knitted socks at home by night. A single pair could fetch as much as two days in the fields, and knitting looked like a way out of poverty. They bought worn-out hosiery machines, rebuilt them into hand-cranked ones, and sold what they made along the roadside. There was no founder, no plan, no investor — just thousands of households deciding, more or less at once, that socks were worth more than rice.
From there it simply snowballed. By the mid-1980s something like seventy percent of local residents were knitting socks at home as a sideline; the roadside selling hardened into specialised sock markets, the town was designated an industrial zone, and every link of the trade — yarn, knitting, dyeing, finishing, packaging, and even the sock-knitting machines themselves — piled into the same few square kilometres. Foreign orders began arriving around 2000; in 2002 the third-generation sock market opened and was soon turning over more than ten billion yuan. By 2004 Datang was the largest sock producer on Earth, with several thousand firms — close to ten thousand once the family mills are counted.
Making a third of the world's socks turns out to be a harder living than it sounds. A pair sells for a handful of cents, bought in lots of five hundred or a thousand; margins fell to as little as five percent, and most of the work was OEM, stitching other people's brands. The cluster's whole advantage is cost and completeness: anything sock-shaped, in any quantity, faster and cheaper than anywhere else. That is a powerful thing to be, and a precarious one.
By 2014 the low-end model had hit a wall — overcapacity, pollution, and price wars that left almost nothing per pair. A clean-up closed thousands of substandard workshops, and the survivors moved toward smart factories with computerised knitting, patents, brands and livestream selling. Set beside the other deep dives, Datang is the block economy at its absolute purest. Songxia next door makes one product too, but Datang made the most ordinary thing imaginable, grew it from peasants knitting in secret, and pushed single-product specialisation as far as it can go — until one small town clothed the world's feet. Its strength and its limit are the same sentence: total focus on one cheap thing buys you the globe and a few cents a pair, both at once.