Who knows what is "Daan, nostalgia, pleasure, two mouths, Xiaoji, empty death"? What is this for,

Zhu Gekongming's "pre-horse lesson" is a simple method for Zhuge Liang to calculate good or bad luck at any time during marching or traveling. Recommend it to you to help you predict yourself and seek luck and peace. The counting method starts from Da 'an in the first month, followed by Shine, Express Happiness, Red Mouth, Xiaoji and Empty Death twice, and the chronological order is twelve months. ...