# PCB Drill Bits

The 0.03mm Edge: How a Migrant Worker Built a Global Monopoly in AI Hardware

Wang Xin, a former migrant worker, has built Dingtai High-Tech into a global leader in PCB micro-drill bits, capturing nearly 30% of the world market. Her success highlights China's shift toward high-precision 'bottleneck' technologies and the critical role of specialized hardware in the global AI server supply chain.