Most of the security staff at the multi-storeyed buildings are upwards of seventy years of age but are surprisingly agile. The old man at our flats retired at the ripe age of eighty .It is not that at that age he became unfit to work.The guy was lean and wiry and was bursting with vigour.It is just that he wanted to get back to his village or some other place in Mainland China .It is amazing to see them so fit although their jobs are sedentary in nature. These guys cant speak English .Conversation with them is ruled out. But the friendliness of these chaps can be easily felt the way they smile at you. Unlike the educated Chinese these guys have an extremely amiable disposition and none of that uppity air of a typical upwardly mobile Hong Kong resident.