NetEase Youdao has launched the 'Yimosheng' open source speech synthesis engine, supporting both Chinese and English languages with over 2000 different voice tones. This engine features a distinctive emotional synthesis capability, able to synthesize voices that convey a wide range of emotions including happiness, excitement, sadness, and anger. Users can download and use it for free on GitHub and implement emotional synthesis and applications through the provided interfaces and script APIs. This project aims to help developers and content creators expand the application scope of high-quality TTS. NetEase Youdao has also introduced voice customization and voice replication.