China is a good place to get depressed for the older retired and married. You can very easily
get lonely and smoke and drink too much. You endbup feeling bitter and twisted about
your own country because you know if you ever set foot in the place again there will be
ten million foreigners ahead of you on the council house waiting lists. Your Chinese
family just tolerate you as your own wife does after a while. Oh death where is thy
sting!

It's called 'complacency', Taffy.
It's the single, number one, first-and-foremost, 100% guaranteed root cause of the destruction of ANY relationship!