Hi Master Lee, Thanks once again for your prompt reply... pardon me, I don really understand below sentence quoted: 1. In my opinion, between the devil and the deep blue sea; between MRT stations (other than the Circle line); the tracks of the MRT stations are generally quite "straight" especially those elevated lines.... Compare this with the LRT tracks..... Does it has to depends on the tenant 'BA ZHI' also? And for my house, can I install ceiling fan at my living hall? Thank you so much.