This document provides information about WeChat QR codes, including what they are, why they are popular, how to create and customize them, and how to scan them. It notes that WeChat QR codes contain information that is instantly accessible once scanned by a smartphone. They are popular because they enable WeChat group chats, official accounts, mini-programs, promotions, and cashless payments. It provides steps for creating, customizing, and scanning WeChat QR codes, and concludes with tips for flawless QR code scanning.