If Yongnian is where China sells its bolts, Haiyan is where it makes the hard ones. A county on Hangzhou Bay, nicknamed “Iron Haiyan,” is the high-strength fastener base: about 700 makers producing some 14,000 varieties, including the brake discs, couplers and bolts that hold together China's Fuxing high-speed trains.
Haiyan, a county in Jiaxing on the north shore of Hangzhou Bay, has been led by the fastener industry for so long it is nicknamed Iron Haiyan and the hometown of fasteners. Its makers are gathered in four industrial clusters: around 700 fastener manufacturers, more than 150 of them large, producing some 14,000 varieties. The fastener output is worth over 13 billion yuan, and the wider chain over 17 billion, roughly a quarter of Zhejiang's fastener total and about a tenth of China's market.
Where Yongnian's strength is its swarm of workshops, Haiyan's is grade. The county leans toward high-strength bolts, threaded rod, long-bolt series and engineered special fasteners, anchored by the listed giant Jinyi, one of the country's largest fastener companies. Fewer firms, larger plants, harder steel: this is the part of the industry where certification and metallurgy matter more than price.
The clearest measure of Haiyan's grade is where its parts end up. Critical components for China's new-generation Fuxing high-speed trains, brake discs, gearboxes, couplers and seat supports, come from a Haiyan enterprise. The same humble fastener that holds a shelf together, engineered and certified, is trusted to hold a train together at 350 kilometres an hour.
Haiyan built the institutions a high-end cluster needs: a national professional fastener market, a national-level fastener testing center and a surface-treatment center, giving it a full chain from raw material through certified, finished part. It is the Zhejiang cluster model applied to a product most people never look at twice.
Read Haiyan beside Yongnian and the division of labour is clear. The north (Yongnian) is volume and distribution, the bazaar that sells half of China's bolts; the south (Haiyan) is strength and engineering, the place that makes the certified, safety-critical ones. Same humble product, organised for opposite ends of the market.