What does the zodiac mean in the old calendar?

Building, full, flat, black; In addition, danger, determination and yellow; Can be used, opened and used; Sealing and crushing are not the same.

There are twelve stars in this formula, which are called ecliptic day and underworld day. It is called "building divided by twelve straight lines" and "building divided by twelve passengers". Most of the aptitudes and taboos in the yellow calendar are based on it in turn.