[Solved] Three Civilizations Exchanged

 Between 800 and 1400 CE, new religions, ideas, and technologies are exchanged between China and Japan. After the Mongol conquests, these ideas and technologies are then introduced into Europe along the Silk Road. What do you think are the two most important features that the three civilizations exchanged? For each feature, please identify the time period it moved from one civilization to another, and what civilizations were involved.