See Baidu Encyclopedia, said very detailed
https://baike.baidu.com/item/%E4%B8%89%E5%85%83%E4%B9%9D%E8%BF%90/6410207?fr=aladdin
personal idea:
Three yuan National Games is a unified system of space and time, we understand the laws governing the operation of which can be inferred time good and bad fortune, orientation.
He began to count from 1864, now is the lunar calendar 2019, the eighth ship in the middle. Principal by the white left auxiliary star.