Question

*Silk Road, Around 220 CE*
What aspects of culture were shared between the east and west during the 4th through 7th centuries?

Answer 1

I know a lot about the Silk Road.
But this "east and west" lost me. Do you mean what went to and fro?
If I were you ask you teacher to explain the question.
As for the aspects of culture passed, many were:
Clothing, Art, Stories, Songs.

Extra info;
Spices, and silk.

(I could give a better one if you explained you question a bit more).