Is there a simpler explanation for little Liu Yao?

I wonder what kind of explanation is needed.

The theoretical system of six hexagrams?

If so, my personal opinion is:

Liu Yi uses the ancient cosmic space-time code (heavenly stems and earthly branches and other symbols) to calculate its subsequent results.

Similar to weather forecast, satellite cloud images and other data are obtained to infer the weather situation in the next few days. In other words, the weather forecast is actually a kind of divination.

However, Liu Yi used ancient words, and the weather forecast used modern words!