What is the radical of Kao Hua?

Radical: _\x0d\\x0d\ Basic word meaning \x0d\\x0d\ 1. Test, test: ~ test. ~ check. \x0d\2。 Check: ~ check. ~ diligence. Ji ~. ~ nuclear energy. \x0d\3。 Inference, research: ~ ancient times. ~ according to. ~ books. ~ certificate. \x0d\4。 Old age: long life ~. \x0d\5。 First refers to the father, then refers to the dead father: first ~. Like a funeral. \x0d\6。 Knock, knock: "and the poor are looking for it with axes. They think they really got it."