Core Insights - The WeChat HarmonyOS version app has officially surpassed 20 million installations, marking a significant milestone in the development of the HarmonyOS ecosystem and indicating a new stage of collaboration between domestic operating systems and mainstream applications [1][3] Installation Growth - Since its launch on June 26, the WeChat HarmonyOS app has shown a steady growth in user acceptance and installation, reaching 10 million installations by July 27, 15 million by September 11, and 18 million by September 28, effectively doubling its user base within a few months [3] - The current installation figures show that the WeChat HarmonyOS app has surpassed 20 million on the HarmonyOS 5.1 system, while the HarmonyOS 6.0 system has 19.92 million installations, indicating stable adaptation across different versions [3] Functionality and User Experience - The WeChat HarmonyOS app has achieved comprehensive coverage of core service scenarios, including one-on-one and group chat communication, audio and video calls, Moments browsing and posting, note management, reading public account articles, watching video content, information search, and using mini-programs [3] - The app maintains a familiar WeChat service ecosystem, ensuring users have a seamless and convenient experience on the HarmonyOS platform, meeting diverse needs for social interaction, information retrieval, and service access [3]