After restoring Baidu Netdisk text messages to the local machine, is there still a backup?

Yes.

Download mobile Baidu cloud disk. Open the home page of the network disk and find "More". After opening more, find "Mobile Phone Backup" and click to enter. One of the items in "Mobile Phone Backup" is "SMS Backup". Open SMS backup, there are two options: "Backup to cloud" and "Restore to local machine". We need to back up now, so click "Backup to Cloud", so that the text messages are successfully backed up to Baidu Cloud. After changing the mobile phone, install Baidu Netdisk - log in - restore to the local machine, and that's it.