Resolved

git add -A

It can stage all files, and it was used before

git add .

Only new files and modified files can be staged, no deleted files

When you git upload, take a look at yourself

There should be some unuploaded marks

If you want to upload delete (upload all)
git add --all

Upload and delete if you want
Baidu by yourself

Commit the changes before pushing

I feel like you didn’t commit into the repository
It is recommended to use the command git add -A然后使用命令git commit -m "del" 再然后要使用 git push in the project root directory to push to the remote server

It is recommended to use the git status command again after each add to check whether it has been staged