刚看了加州法律，原来房东可以带人看房，不需要房客允许

California law states that landlords can legally enter a rental unit to show it to prospective tenants, buyers, lenders and contractors. If you don't cooperate, the landlord can show the place anyway. If you change the locks, the landlord can call a locksmith, charge you for it, and have the locks changed, providing you with a key during your lease term. The bottom line is that the owner of a property has a right to their property.