During their recent work, Ruiying focused on stabilizing Android development workflows across the mrousavy/expo and expo/expo repositories. They addressed a persistent ClassCastException in the headless app loader by refactoring resource access to use context.applicationContext, which improved lifecycle management and reduced crash risk on legacy React Native architectures. Additionally, Ruiying resolved Android build failures in expo-file-system by correcting the placement of AndroidManifest.xml, ensuring reliable build processes for developers. Their contributions demonstrated a strong command of Java, Kotlin, and Android development, with careful attention to backward compatibility and maintainability, though their work was limited to targeted bug fixes rather than feature development.