The artwork decorating numerous rock-cut caves at dunhuang, a major stop on the suggests that commercial trade had an important role in the spread of buddhism in china.

The appropriate response is the Silk Road. It was an antiquated system of exchange courses that were for quite a long time key to social communication initially through areas of Eurasia interfacing the East and West and extending from the Korean landmass. 
Despite the fact that silk was surely the significant exchange thing sent out from China, numerous different products were exchanged, and also religions, syncretic methods of insight, and different innovations.