Asking questions again is fine. Mentioning previous answers is not intended to discourage discussion. Further questions, data, or debate are welcome. Especially here, where the FAQ is more general, talking about diffusion along the Silk Road as well as direct knowledge.

There's an FAQ section at https://www.reddit.com/r/AskHistorians/wiki/antiquity#wiki_rome_and_ancient_china . In the app, the # anchor doesn't work, so you look for "Rome and ancient China" near the bottom of the page.

There are answers by /u/Tiako , /u/octaviusromulus , and /u/leprechauns_scrotum .