The 'Chinese' Theory: For and Against

[Rafal]

The quire binding is European. Unless you suggest the 'Author' shipped 15 calfskins from Europe to Asia, processed them there, and shipped them back to be bound

To be honest the binding happened probably much later and wasn't done by the original author.
So it is enough that some traveller carried some parchment with him.

He could also write the first version on some different parchment or even paper and then back in Europe ask some European scribe to copy it to the parchment that we own.

These are things that we may never know. Personally I see more potential in the text analysis.