Thank you for the advise.

Why change on Thursday? Any particular reason?
Me and my bro also have amulets, can we share the same plate (where we put jasmine flowers) together?
Can we share the amulet? Such as rotate wearing?
Can i give my amulet to my friend or relative? Will this be offensive to the amulet? Will the amulet think that we don't like them, then give them away?
Sorry....alots of questions again.