Isn't the change of heart the main divination in the Book of Changes?

The main hexagrams don't refer to the eight pure hexagrams (the original hexagrams that the man said)

Keeping the mentality unchanged generally refers to static divination, and there is only one vertical divination image (many websites arrange divination, but it is actually wrong to discharge two divinations with the same vertical arrangement for static divination).

The main divination is relative to the moving divination. When the movable hinge is provided, it will be replaced with a new hinge, which is two rows of vertical hinges. Such two hexagrams are called change of mind, and the relative original hexagrams are the main hexagrams.