Why are the two rabbit ears of the Tang Dynasty hat facing down and the Ming Dynasty hat facing up?

The scientific name of the hat in Tang Dynasty is "幞头"

The drooping band is called "垂角" or "soft foot"

The turban in the movie and TV dramas nowadays is all The turban in movies and TV dramas nowadays are all made up, and the drooping horns are also hard, which does not match with the historical objects.

The turban has been developing and changing even in the Tang Dynasty, there are flat head turban, hard foot turban, round head turban, lined pointed scarf turban, warped foot turban 。。。。。 By the Song Dynasty there was the spread foot turban, and as for the Ming Dynasty there was the formation of the ursine hat and so on.