Can Chinese Hamsters live in pairs.

[AmityvilleHams]

I would immediately separate them. As souffle mentioned same sex pairs are not natural, and it happens to cause constant levels of stress that are so easy to avoid just by housing all hamsters on their own regardless of species. You also gain the benefit of more enrichment opportunities when housing hamsters on their own, since pairs and groups can't have any sort of platforms or levels for example among other things that would definitely limit your potential enrichment choices.