what material did the asian country trade with the european country?
Silk, Roman glassware and high-quality cloth
Sino-Roman relations
The indirect exchange of goods on land along the Silk Road and sea routes included Chinese silk, Roman glassware and high-quality cloth. 
who prevented the romans from sending embassies to the chinese UNANSWERABLE who were the relations between? Roman Empire and Han Empire of China, as well as between the later Eastern Roman Empire and various Chinese dynasties
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Sino-Roman relations [SEP] Introduction
In Chinese records, the Roman Empire came to be known as "Daqin" or Great Qin. Daqin was directly associated with the later "Fulin" () in Chinese sources, which has been identified by scholars such as Friedrich Hirth as the Byzantine Empire. Chinese sources describe several embassies of Fulin arriving in China during the Tang dynasty and also mention the siege of Constantinople by the forces of Muawiyah I in 674–678 AD.