Hi Cecil, thanks for your reply. What I mean is that I lack metal & since no. 7 is metal, i assume that it is lucky for me (I didn't base on Kua no.) Since this is a period of 7, I guess no. 7 should be very lucky for me. But when period of 8 comes, I assume that no. 7 means robbery & crime which is unlucky. But no. 7 still means metal in period 8. My question is whether I can still use no. 7 in say my tel no, house no or car no. during period of 8. Is it a double-edge sword for me? Thanks very much in advance.