Complex sentence: Sa'id of Mogadishu a Somali explorer travelled to China in the 14th century, when China was ruled by the Yuan Dynasty, and noted the trading communities of the Chinese ports and cities.
Split into simpler sentences: Sa'id of Mogadishu a Somali explorer travelled to China in the 14th century, when China was ruled by the Yuan Dynasty. And noted the trading communities of the Chinese ports and cities.