Photos of people from the "Mien Yao/Dao" tribe (Vietnam).
Thanks to Pamela A Cross from www.tribaltextiles.info for her help in identifying this tribe.
Pamela A Cross wrote: The style of headdress, plucked eyebrows and plucked forehead, the rectangular silver plaque with stars below the neck (and the style of chain), and the trousers or pants they appear to be wearing, all suggest that they are they are Mien Yao/Dao. The tunic embroidery although very garish is typically Mien Yao.