The style of her extended sleeve could date back to Tang Dynasty ( 618 - 907 A.D. ) or much earlier.

Ancient Chinese consider that the earth was square. This is exactly what her head looked like. It is an important clue for people today to determin who this statue represented. That is, mother earth. Note that there is a nipple emerged from the top of her head. It means that mother earth is the sources of naurishment.