In the long arc of technological self-determination, Xiaomi has crossed a threshold that few consumer electronics companies attempt: the design and mass production of its own silicon. With the Xring O3 now moving through TSMC's 3-nanometer foundry and two companion chips aimed at AI and autonomous vehicles, the Chinese company is staking billions on the belief that controlling one's own chips is the foundation of controlling one's own future — even as the market reminds it that ambition and scale are not the same thing.