Apple's iOS 27.3 first developer preview adds a dedicated feature Flag, suggesting Siri AI localization for the Chinese market.

Apple iOS 27.3's first developer preview version introduces a feature switch named LinwoodChinaMainland, associated with the IntelligenceFlow framework, which is the internal scheduling layer of Siri AI. This switch is currently disabled but is considered one of the necessary conditions for Chinese market devices to qualify for Siri AI usage.