Another example is geographical consistency, geographical Dont Ask For Help, encyclopedia of mountain dharma, secret, instructions for the son of man, Gankun bridge, geographical records, a book of geomantic omen, four marbles), fairy tales, geographical truth, compass interpretation and compass interpretation. All the books or books on logic and qi fail to cover Luan Tou, or both of them are mentioned, but the root of misfortune and the cause of good or bad luck are all omitted, so scholars have no way to verify them.