My chinese birth sign is Dragon, this embroidery was clearly waiting for me in the second hand store. When i opened it's frame i found a sticker at the back with a written text as shown on the picture below.
The embroidery is made by hand by the Miao people from Shidong. It's probably silk for it has a very nice shine to it. The little knots at the back tell that it's handmade.
The Miao people usually wear big embroideries on their coats.