In the hushed corridors of the technology hubs in Beijing, Hangzhou and Shenzhen, a quiet but significant shift is reshaping the landscape of AI development in China. Over the past 12 months, a wave of elite engineering and scientific talent has returned from the US to Chinese shores.Led by the return of top researchers now leading AI development at tech companies ByteDance and Tencent, this reverse migration is raising a critical question: why are the architects of the future — most of whom sta...