Chinese in Roman Britain

[Nathan Ross]

We know the Roman's supplied Carroballista to the Bosporan's for use against the Goths for example.

Or to the Chersonese to use against the Bosporans (Sarmatians)?

But the brief and interesting (if perhaps dubious) account in Constantine Porphyrogenitus doesn't state where the artillery came from - it could be that the Chersonese just mounted their own mural artillery on wagons!