Dear friends: I have two questions: _ I have bought a pack with 10 cheap modern copies of chinese coins for feng shui. They are made of a very thin metal. At the Yan face or obverse, the 4 siymbols of the emperor appear, and at the Yin side two symbols appear, but they?re not chinese ones but two christians>date relatd to emperor?s mandate years(i.e 1730-1780), and my question is:>for chinese coins to work properly is necessary to be exact copies for oth sides, or my coins also can work? -When one buys antiquities for decoration(books, pictures, furnitures) at a shop, is necessary to do regarding feng shui any kind of purification or not? If the answer is yes: how could do easily, it? Thank you