Help explain this kind of maidservant dress

In fact, you do that is not really a maid of honor dress, is a kind of our Hanfu, that kind of chest mattress skirt in the Tang Dynasty is very popular, and not only the court ladies to wear. That kind of style is prevalent in the Tang Dynasty, as for the use of this kind of clothes is more loose, have elongated height, cover fat and cover the advantages of thin.