Questions about running a sub-shell in () (redirection)

About running the sub-shell in () (redirection related)-Linux general technology-Linux technology and application information, the following is a detailed description. Such a command date> desktop/new is easy to understand. The command will redirect the output date to the new file on the desktop, But I entered another (date)> the desktop/new command is used for testing. I think this date will be run in the sub-shell, and the output of date in the sub-shell is not redirected, so date should be printed on the screen of the sub-shell, then return the parent shell, and then run the> desktop/new command. Whatever happens after that, I will enter this command to test it. I didn't expect it to run like it without parentheses. Similarly, the output is redirected to the new file. I cannot figure out why. Then I used another one (date> desktop/son)> desktop/new test. The result shows that the output is redirected to son, and the new content is cleared. I will use the date> desktop/son> desktop/new test (that is, remove the brackets of the previous command ). The result shows that the output date is printed on new, and the son file is cleared. I am using bash. I don't know which man can explain it.