Xiaomi is doubling down on its five-year plan for core technologies including chips, artificial intelligence and operating systems, aiming to position itself as a deep-tech player amid China’s self-reliance push, while peers such as Li Auto and Xpeng accelerate moves into humanoid robotics. Lei Jun, founder, chairman and CEO of the Beijing-based smartphone and electric vehicle giant, on Tuesday said private technology firms must deepen investment in core technologies and speed up the...