Let me check with Grok
Apple relies heavily on China for manufacturing, with estimates suggesting around 80-90% of its production capacity, particularly for iPhones, iPads, and MacBooks, is based there. The majority of assembly is handled by Taiwanese firms like Foxconn, Pegatron, and Wistron, operating massive facilities in cities like Zhengzhou and Shenzhen. Over 95% of iPhones are reportedly assembled in China, with a single plant in Zhengzhou, known as "iPhone City," producing up to 80% of global iPhone supply at times. China's dominance stems from its skilled labor force, extensive supply chain network, and infrastructure, which allows rapid scaling—something other countries struggle to match. For instance, Chinese factories employ over a million workers and can source components from a dense network of local suppliers, with 40-47% of Apple’s global suppliers based in China as recently as 2021.