What does the Diao Tianxing in Feng Shui mean? How to check Diao Tian Xing?

Your question should be referring to the Feng Shui method of judging due dates, right?

For example, Shen Zichen, if Shen Fang and Zifang meet certain good and bad conditions, the corresponding good or bad luck may appear in Chen’s year, month and day!

This cannot be explained in a few words! You can look for information on Diaochong!