He always says we, the Chinese musicians, should make our own music. And he hopes when he gets old, there will still be someone singing his songs, because he believes that music will never die.
musician 改 musicians
he was old, 改he is old
He always says we Chinese musician must make ourselves’(our own) music. And he hopes that when he was(is) old, there will still be someone singing his songs, because he believes that (the) music won’t(can't) die.