Help & Support
2026-10-08
Write a letter
The app interface currently uses Simplified Chinese. In 写信 (Write), use your finger to write or draw. Choose paper, pen width, ink and eraser, or undo and redo. Use two fingers to zoom or move the canvas. Short notes and long letters use different sizes; changing size starts a new sheet and offers to save the current drawing.
Send an image
Open the full letter preview, then tap 分享 (Share). The system lists installed apps that can accept an image. Your friend does not need Jianzi to view the image. Your selected app completes sending; online social apps need their own network connection. Jianzi has no friend chat, incoming mailbox synchronization or push notifications.
Saved letters and backup
Sharing first saves a local copy to 信匣 (Library). Canceling sharing keeps it. Open a saved letter to share it again or continue editing. Deleting a saved copy does not clear the current draft. Use the system share sheet to export important letters to Files or another destination before uninstalling.
Contact
Email 510245979@qq.com with your device model, iOS version, app version and a description. You may attach a screenshot without private content. Do not send passwords or real private correspondence.