Shangrao
Scenic Shangrao quietly built a 44-firm photovoltaic cluster; JinkoSolar's base shipped 300GW by 2025, turning a border city into an inland solar moat.
Shangrao sells postcard scenery. Its faster-growing business is solar hardware. The city sits just 84 meters above sea level on Jiangxi's eastern edge, with about 1.18 million people in the urban area and direct commercial pull from Zhejiang and Fujian. Tourists know Sanqing Mountain and Wuyuan's whitewashed villages. Manufacturers know Shangrao as the home base of JinkoSolar and one of inland China's most complete photovoltaic clusters.
That contrast is the Wikipedia gap. Shangrao looks like a scenic border city, but its economic logic is closer to a coastal spillover machine. JinkoSolar was founded here and by 2025 said its Shangrao base had shipped 300 gigawatts of modules worldwide, a scale few countries could match as a national industry. Local reporting says the Shangrao Economic Development Zone now contains 44 photovoltaic enterprises spanning silicon wafers, cells, modules, glass, frames and recycling. In 2024, the zone signed 19 major manufacturing projects worth ¥36.6 billion ($5.1 billion), many tied to the same chain. Once the anchor firm reached scale, suppliers had a reason to co-locate, logistics firms had a reason to specialize, and rival inland cities had a harder time pulling the ecosystem away.
The pattern is not just industrial policy. Geography does part of the work. Shangrao sits close enough to the Yangtze River Delta to absorb capital and technical talent priced out of richer coastal cities, but far enough inland to offer cheaper land and labor. That is preferential attachment with regional characteristics: success attracts the next layer of success. Over time the supplier web becomes its own moat.
Biologically, Shangrao behaves like mycorrhizal fungi at a forest edge, routing resources between richer and poorer zones until the exchange network becomes indispensable. The mechanisms are network effects, preferential attachment, and competitive exclusion. Once a photovoltaic cluster gets dense enough, later entrants do not compete against one factory. They compete against the whole underground web.