One question to all Sifu here, is Xiao infrared control able to access whole apartment with 700sq (xiao ai at living room)? Means can i still remote the aircon / ceiling fan on/off with room door close?
If can then i can thrown all remote control in house liao.     

Can be used. Just not by voice commands. Voice commands can be used only at early morning. Alarm works, play songs from speaker app works, as bluetooth speaker works, home appliances control from phone works. To those who consider to buy better buy 天猫精灵. But  i predict sooner or later 天猫精灵 also become same due to heavy "monitoring". If u r loaded just buy HomePod.