As for "Jia" and "Jia", the former is the most commonly said "going home", while the latter is more common in patients with cognitive impairment ("dementia", which was cancelled by Japanese authorities in 2004). When the parties say it, they still say the former. They think they know where their home is, but they don't really know it, so it is more appropriate to use the latter (because in the eyes of outsiders, they want to go back to their inner home rather than their material home).