Why should be divided zodiac

Zodiac including ford palace life, parents palace, palace (lu life palace), along with the time, little limit, time house (called a flow transported palace), for example, in the inference, the third time is husband and wife palace, is the fourth time the children's palace, at this time how to distinguish the palace is the third time, or palace of husband and wife?See John Paul life palace and flow transport palace star obsidian method is different, see flow transported house should consult time star obsidian.