Yinyu and Paipai are not merged. Yinyu and Paipai are two different applications. Yinyu is a voice-based social application that allows users to chat, make friends, etc. through voice. Paipai is a picture-based social application that allows users to socialize by taking and sharing pictures. As of August 17, 2023, Yinyu and Paipai have not merged. The two applications still operate independently.