I'm usually annoyed as fuck by the idiotic cries of "Wikipedia isn't a source, ha ha ha!" all over the Internet; on the contrary, WP is usually not only an adequate but actually a pretty good first source for ordinary online discussions (and then if you really want to get into details, continue from WP's footnotes).

But in this particular case, with these particular WP articles... Yeah yeah, you were probably kidding. But there are also more serious articles on the subject. Like https://en.wikipedia.org/wiki/Sino-Roman_relations .

I was kidding but thanks for the more serious link anyway.