The difference between Shao Zi's divine number and Shao Zi's easy number.

Shao Zishen and Shao Ziyi are the same book. The Whistle Book was written by Shao Kangjie, a famous Taoist in Song Dynasty.

Shaozi Shenshu, also known as Shaofuzi Shenshu, is one of the five major mathematical techniques in China: Wei Zi Doushu, Iron Plate Shenshu, Shaozi Shenshu, Antarctic Shenshu and Arctic Shenshu.