Dear Master Cecil Lee A big thank you so much for your advise. I'm very much please of your reply and it was so fast. May I add a follow up question to your answer. I just plot up a flying star chart and found out that the double 8 sector is at the back of my house (house face 4 degree North), and also one of the toilets is partially located here. Any advice on this please? My house has a small hill at the back and front is gently sloping down to road. TQ