Qianyi 遷移宮Zi Wei's twelve palacesZi Wei Dou Shu 紫微斗數

遷移宮 sits directly opposite 命宮, and that fact is its entire meaning. It faces 命宮 across the whole square, and the tradition never reads one without the other — because how a person sees themselves and how they're received once they walk out are frequently not the same thing.

So this isn't a palace about travel, it's your outward version: who you become in unfamiliar rooms and what people out there actually receive. Some charts have a brighter 遷移 than 命宮, and those people are more themselves outside than at home. The reverse pattern tires on contact.

When 命宮 has no main star, the stars it borrows are this palace's. That rule says a great deal on its own: when your defaults aren't pronounced, what defines you is how you meet the world.