https://www.dropbox.com/s/tutyzx547q54ku8/24jieqi2012.xlsx?dl=0 https://www.dropbox.com/s/db9jt51xp2iv866/%E4%BA%8C%E5%8D%81%E5%9B%9B%E8%8A%82%E6%B0%94.doc?dl=0 https://www.dropbox.com/s/5yz4pnq2descdzh/BAMA.pdf?dl=0 https://www.dropbox.com/s/wriwf308qaj3c33/Heavenly-Mathematics-Week-10.ppt?dl=0 Don't know never mind -learning is a endless process, applying the objective truths are important - failing which cause you 'a bomb' - "dying by don't know how you die' The sunlight, wind, rain are the three key natural issues dealing with residential unless ones stay underground with artificial lighting, forced air, rain is not so much of a concern as long as the underground not get flooded. We're a bit 'lucky' in Singapore(1 deg N) so the sun moves 'up & down' - view from earth - meaning sun rises from east, goes to our top, then sets in the west, however, with only 48 deg variation. So we can choose a 'fixed' residential with door/windows directions to avoid/welcome rising and setting sunlight. Unlike Beijing (46 degN) and Sydney (46 deg S) the sun movement is not so much 'up & down' but 'left & right' - slowly download the articles, read and digest. Personally, I prefer to have morning sunlight to go into my house and do not mind 'a little bit' of evening sunlight to go through windows or main door. This determines HOW I choose the FACING of DOOR and WINDOWS. Ones has to understand various directions of 'wind blow' throughout the year in where he stays so he choose the FACING of DOOR and WINDOWS to enjoy the natural wind. Of course, these days he can enjoy FORCED air by electric fan and aircon by hack caring the directions of door and windows. Personally,I prefer to have morning sunlight through windows, to have N-S windows facing. No direct evening sun through windows. I have enough encounters with flooding, I avoid flooding-prone areas. Of course, I like 'good view', i like 'good neighbour'( Can I choose??), i like 'convenient' place..... All these are my 'parameters' of the equation of choosing a good house, what about yours? 1+2+3+....=8888 or what NESW ?