HUANG JI JING SHI
Huang Ji Jing Shi
The great cycles of the world, after Shao Yong.
Year
Month
※ "Month" here refers to the solar term, not the lunar or Gregorian month.
☯
Yuan · Hui · Yun · Shi
Yuan
One Yuan = 12 Hui = 129,600 years — the grand cycle of heaven and earth.
Hui
One Hui = 30 Yun = 10,800 years.
Yun
One Yun = 12 Shi = 360 years.
Shi
One Shi = 30 years — the span of an age.