Huawei children's watch accidentally deleted the chat function.

1. First, check whether Huawei children's watches are backed up. If you use Huawei children's watch cloud service or backup application, you can try to recover the chat record from the backup.

2. Secondly, if there is no backup, you can try to use data recovery software to connect Huawei children's watches to the computer, run the software to scan the watch storage and retrieve the deleted chat records.

3. Finally, if you use Huawei Children's Watch to send the chat record to others or save it on other devices, you can try to get a copy of the chat record from other devices or contacts.