What does the dead line mean?

The empty line is actually a dividing line. In ancient geomantic gossip, there are eight palaces and twenty-four mountains. The empty line is the dividing line between the Eight Palaces and the Twenty-four Mountains.

And the house is empty, indicating that the orientation of the house is towards the "empty line". The empty line is actually a dividing line. In ancient geomantic gossip, there are eight palaces and twenty-four mountains. The empty line is the dividing line between the Eight Palaces and the Twenty-four Mountains. The dividing line between mountains is called "small empty death"; The dividing line of the palace is called "Big Empty Death".