Yin And Yang

When talking of Yin and Yang, the first thing that pops in our minds is related to China. Well, this symbol was first used as a shield design for the Roman Army. If you find this to be strange, we haven’t revealed the weirdest part yet. Yin Yang is the symbol of Taoist culture, popular in China. Here comes the strangest part, according to the historians there is no way that the Taoist interacted with the Romans. Then how did they both land on the symbol?