What is the numerology of Northern Blindness?

In short, blind sects are also divided into many factions, which are generally northern and southern. Blind numerology seems to be rarely exposed at present. In short, the master is still in the folk, especially in the Central Plains. Once I visited a folk expert and the calculation was very accurate. Take six parents as an example, every sentence is true. Blind factions are mainly ten rows of songs. Last time, the elder seemed to say that there was another book called Hundred Chapters Classic, which was higher than the ten-line song, but it is estimated that it has been lost at present. Among the famous numerology teachers, I think Ren's level is quite good, especially in actual combat, which should be a little real kung fu. It is better to find experts in the countryside than to be a blind Sect.