Re: Kingodm Cynops
I agree that it is possible to keep many Cynops species aquatic whole year around but some like to have a rest on land from time to time. cyanurus and orientalis are the "most aquatic": adults and metamorphed juvies do fine in densely planted aquaria, but fudingensis and orphicus like to go on land regularly (I have experience only with Chinese species).
But I could imagine all species of Cynops have a terrestrial phase in their habitat, most probably during hibernation in winter.
But this is a guess, I do not know ecological publications about Cynops.