Difference between cinnamon and longan:

1, called different: longan is actually cinnamon, is the same fruit plant. Freshly picked called longan, artificially dried into a cinnamon. Northern people more longan called cinnamon, because the transportation can not be fresh, so after the sun-dried delivery leads to call different.

2, moisture differences: frankly speaking, longan is the fruit with moisture, cinnamon is water is dried fruit, dried fruit. The essence is the same, the equivalent of a change in storage and consumption methods, the nutritional value of the difference is not great.

3, ancient circulation is different: need to pay attention to China's ancient feudal society, the emperor was known as the "true dragon son of heaven", the dragon on behalf of the emperor's moniker, and the dragon's eye contains the word dragon, and therefore violated taboos, was ordered by the emperor to change the name of the cinnamon.

The above reference? Baidu Encyclopedia - Gui Yuan