Xianyun real person Feng Yingzhang: Lectures on Practical Forecasting Techniques in the Six Lines of the Book of Changes, Page 352

Xianyun real person Feng Yingzhang’s “Six Lines Forecasting the Road to a Higher Level” two volumes

Xianyun Real Man Feng Yingzhang Chinese Book of Changes Six Lines Practical Forecasting Technique Lecture Notes 352 pages