East to Occident (from wes to east) the era of European empire trade with Asia. To learn that opium is commercial, however. Drugs and opium became prevalent at large, however.
The Occident to orient (FROM EAST TO WES) era of European Empire trade with Asia. To learn whether a commercial item, opium and opium has become a ubiquitous drug widely?
West to East (FROM WES TO EAST), the era of the imperial trade between Europe and Asia in order to learn how to trade in opium and how commercial opium addiction has become a substance widely used in a wide circle.