This document summarizes Xiaomi's business and rise to becoming one of the most valuable tech startups. It discusses that Xiaomi began in 2010, launched its first smartphone in 2012, and has since grown tremendously, selling over 60 million smartphones by 2014. It outlines Xiaomi's product portfolio including phones, tablets, software, accessories and home products. The document also summarizes Xiaomi's marketing strategies of social media promotion, customer feedback, and zero spending on traditional advertising that have contributed to its success.