無量壽經連義述文贊 2.157

2.157

經曰「於不可思議」至「無量德行」者，述云：第二、修身行。有二：初、修因；後、歎果。初又有三：初、總標；次、別釋；後、還結。此初也。黃帝算有三品，且舉其一，十千億為兆，十千兆為京，十千京為姟，十千姟為秭，十千秭為匹，十千匹為載故。有人言：兆載者遠年。非也。

The sūtra says: "For inconceivable..." up to "immeasurable virtuous practices." The commentary states: Second, cultivating practices for the person. There are two parts: first, cultivating the causes; second, praising the results. The first also has three parts: first, general presentation; next, specific explanation; finally, conclusion. This is the first. The Yellow Emperor's mathematics has three systems; citing just one: ten thousand yi (yì) is a zhao (zhào), ten thousand zhao is a jing (jīng), ten thousand jing is a gai (gāi), ten thousand gai is a zi (zǐ), ten thousand zi is a pi (pǐ), and ten thousand pi is a zai (zǎi). Some say that zhaozai means 'distant years'; that is incorrect.