This article has a lot of info on what contacts we have evidence to support: https://en.wikipedia.org/wiki/Sino-Roman_relations https://en.wikipedia.org/wiki/S

This article has a lot of info on what contacts we have evidence to support: https://en.wikipedia.org/wiki/Sino-Roman_relations https://en.wikipedia.org/wiki/Sino-Roman_relations And I'm sure we'll only ever know at best maybe a tenth of what happened. (Wild guess.)