Complex sentence: Though silk was certainly the major trade item exported from China, many other goods were traded, and religions, syncretic philosophies, and various technologies, as well as diseases, most notably plague, also spread along the Silk Routes.
Split into simpler sentences: Though silk was certainly the major trade item exported from China, many other goods were traded, and religions, syncretic philosophies, and various technologies. Diseases, most notably plague, also spread along the Silk Routes.