The Mongols didn't create the Silk Road, or Chinese exports.  The Silk Road had been open and closed at various junctures throughout history, when the political situations in China and Central Asia allowed it, and several Chinese dynasties had encouraged it.  Others did not.

I'm no fan of Eurocentric history, but this really sounds like the author was trying to cash in on the recent popularity of "some ethnic group created the modern world", like that Irish book and the Jewish one not too long ago.