Lin Gengfan-Illustrated Taoist Astronomy, Calendar and Arithmetic – Purple Wei Dou Shuo Reasoning Volume (579 pages).pdf

Deng Hansong: The secret of mental arithmetic by hand

Kang Yicheng’s “Example Explanation of Finger Pinching and Magical Arithmetic”

Deng Hansong Pinch Mental Arithmetic Secret Secrets of Meeting the Sea of Fleeting Years.pdf

Display the newly compiled and practical daily fortune calculation arithmetic.