Li Weihong's note: The five patients, ditches, villages, cities, roads, etc., are particularly important nowadays. For example, now that railways and highways are being built, graves have to be moved in the end. The five types of non-burials are discussed in the "Burial Sutra" written by Guo Pu of Jin Dynasty: Do not bury on Tongshan Mountain, do not bury on Broken Mountain, do not bury on Crossing Mountain, do not bury on Stone Mountain, and do not bury on Dushan Mountain. Five essentials: the dragon must be true, the acupoints must be correct, the burial must be good, the time must be appropriate, and harm must be avoided. The six precepts are those of Liao Jinjing: Do not go to the water, do not look for the Sword Spinosaurus, do not go to the cave of the wind, do not go to the cave of Wuchen Mountain, do not go to the cave where the Mingtang collapses, and do not go to the cave where the dragon and tiger fly back. Yang Gongsan does not bury: if there is a dragon, he will not bury it in its cave; if there is a cave, no one will bury it (the unscrupulous people cannot use it); there are people who will not bury it at any time (it will not be buried when the year and month are unfavorable, this is the importance of choosing auspiciousness).