[cypher]

It does seem to be more generally accepted now that Chinese are solitary although I think males are less territorial than females, the stress of moving to a new home may be enough to cause them to fall out too so it would probably be best to separate them.
If they are in a small cage then it may be best to stay small at least to begin with until they settle as too much space could stress them out but then see how they go.
I have one in an alaska & one in a hamster heaven, not too much open space, & they are fine with the size.