4. users agree to collect, use or authorize third parties (and such third parties agree to undertake the same personal information protection obligations as this application) to use non-commercial user information obtained through the service (including but not limited to identity information, gender, occupation, learning purposes, voice information such as this application formed in this application), including but not limited to the use of invitation courtesy, so that other users of this application can view the user's avatar, name, voice and other personal data, apply to relevant academic, application research, etc. Unless otherwise agreed by the user, the application will not authorize user information to third parties not involved in the performance of this Agreement for commercial purposes.