The document provides 7 tips for scaling mobile users in China based on Uber's experience in the country. The tips are: 1) Use proper Chinese naming, 2) Optimize third-party app stores, 3) Offline marketing like QR codes is effective, 4) Partner with major ad networks and apps for online marketing, 5) Engage users through major Chinese social media, 6) Communicate hyperlocally, and 7) Offer localized products and services. China has over 1.37 billion people and scaling mobile users there requires understanding regulations, fragmentation, and adapting to the local market.