First of all, its great you have come here for some advice
Chinese hamsters are like Syrians in my opinion, 100% solitary. Chinese hamsters do not have the dwarf genus like Robos, Pure Campbells and Pure Winter Whites do who can live together in the correct circumstances.
However, many pet shops class Chinese hamsters as dwarfs due to their size hence the confusion of whether or not they can live together. But really, there is no confusion, they are dwarfs and they should live alone. I would never risk two chinese hamsters together as they can fight to the death which is very traumatic both for the owner and the hamsters!