It looks like a pair of Lin Jiao Daos are being used here. I have emailed Jared Szymanski at http://www.ChinaFromInside.com to confirm is the weapon is used in pairs, determine who the picture is of, and find out what art or art the weapon is associated with. My guess on the latter would be one or more styles of Xing Yi Chuan. If not, then some sort of Shanxi Province fist.
I currently have a single such blade. There’s not enough room in the grip area to fit two hands so I concluded that the weapon could be used in pairs. It seems comparatively slow, and I am not so sure it is a great offensive threat.