At a pivotal juncture in Apple's shift towards artificial intelligence, the tech giant has officially launched the Apple Watch S12 and Ultra 4, heralding a new chapter in Apple's ecosystem as it evolves into a 'Personal Intelligence Hub.' The S12 model retains its dual-size offerings, introduces fresh color variants, and makes a comeback with ceramic cases. Its display now boasts a peak brightness of 2000 nits, coupled with a 60% boost in durability against damage. The health management system has been upgraded with enhanced sensors for more frequent heart rate tracking and incorporates new features, such as the 'Readiness Score.' Motion tracking accuracy has seen a substantial leap, thanks to optimizations in both chip performance and algorithms. Siri, now deeply infused with AI technology, supports seamless, cross-device conversations, introduces the 'Audio Intelligence' feature set, and maintains a steadfast commitment to user privacy protection. The Ultra 4 is tailored for the professional outdoor enthusiast, featuring a screen with a peak brightness of up to 3000 nits, a novel battery-saving mode, a standard battery life of 50 hours, and an extended battery life of up to 84 hours in low-power mode. The starting prices for the two models are set at 2999 yuan and 6499 yuan, respectively. Pre-orders commence on September 11, with official sales slated to begin on September 18. It is worth noting that certain features, such as Siri AI, are not yet accessible in mainland China, and international users will need to await a system update to fully experience these functionalities.