Sixty-four notes:/photo/m4xr1qsjoxvhsfrmqkjoa = =/423901314926376559.jpg.
In fact, there are many kinds of notes, so I won't list them one by one.
It's no use looking at pictures. You need to read books:/view/eefa4d94d88d0d233d46a14.html;
/view/8 137 CDB ff 12 1 DD 36 a 32d 82 16 . html；
These books are all about notes.
Ask me if you don't understand anything. :)