First of all, Jay Chou never published the book Jieshi Magic.
So far, Jay's only genuine books are Peninsula Tin Box, Gorgeous in D and Music Doesn't Mean Image Doesn't Mean Music.
Everything else is pirated!
Not to mention this signature! Jay's autograph is not like this at all!
He won the lottery on the show. Nothing more than these two kinds. In addition, the signature must be signed with a special pen. You look fake!