Dear Master Cecil, I have just managed to buy a convex bagua (please see picture). my opposite neighbour is using a concave bagua. (which is yellow in colour, image attached previously) My questions are: 1. Do I need to find an auspicious day and time to hang it up? 2. After hanging the bagua, can we keep our door open all the time? Keeping the main door close, make our home very humid and stuffy. Your advise is very much appreciate. Thank you in advance. Ice