When chats are locked, the notification material and contact are concealed. The notification will clearly show as WhatsApp: one new message. 為確保安全，請先從瞭解開發人員如何收集與分享資料開始。資料私隱和安全程序可因使用情況、所在地區和年齡而異。此資料由開發人員提供，並可能會隨時間更新。 You could edit any message as much as quarter-hour immediately after sending, And it will update ... https://apps-whatsapp.com/