Fortune Telling Collection - Free divination - How are the solar terms and various attributes in the yellow calendar derived?

How are the solar terms and various attributes in the yellow calendar derived?

The solar terms and various attributes of the solar calendar are derived from the calculations of the ancients. Because there was no developed technology like ours a long time ago, they can only gain these experiences through slow practice. They are very grateful to the wisdom of the ancients for benefiting our future generations.