Almost unknown to the rest of the globe, Xiaomi has become the world's third-largest mobile phone manufacturer. Its high-end phones are tailored to Chinese and emerging markets, where it outsells even Samsung. Since the 1990s China has been climbing up the ladder of quality, from doing knockoffs to designing its own high-end goods.Xiaomi — its name literally means «little rice» — is landing squarely in this shift in China's economy. But the remarkable rise of Xiaomi...