Is After Seventeen a band of Chen Qizhen or a song?

This is a song by Chen Qizhen. It seems that foreign singers have also released albums of the same name. But generally speaking, there should be no singer with this name, because a singer can be over 17 years old. . . Then there are many people in this world who can only be called after they are seventeen. This is as unrealistic as the singer's name is a man. ...