The sixth Qi begins at 87.6 ke and ends at 75 ke. The fifth Qi begins at 76 ke and ends at 62.5 ke. The sixth Qi begins at 62.6 ke and ends at 50 ke. This is referred to as "six-two," which represents the numerical pattern of Heaven. (In the Yi Chou year, the first Qi begins at 26 ke on the 366th day of the Jia Zi year and ends at 12.5 ke on the 61st day. This amounts to 60 days and 81.5 ke. The six Qis in total amount to 365 days and 35 ke. This is referred to as "two of the six Qis," corresponding to the numerical pattern of Heaven.) In the Bing Yin year, the first Qi begins at 51 ke and ends at 37.5 ke. The second Qi begins at 37.6 ke and ends at 25 ke. The third Qi begins at 26 ke and ends at 12.5 ke. The fourth Qi begins at 12.6 ke and ends at 100 ke (the water level). The fifth Qi begins at 1 ke and ends at 87.5 ke. The sixth Qi begins at 87.6 ke.