Good photo, Ren Ren! Looks like you nailed it. A pole axe as I suspected. Wonder what the white bit sticking out the mouths are tho. looks blunt, but I do not think it's a matchlock barrel
Found this photo of a 19c Viet dragon glave and elephant halberd: The halberd's spear-point looks distinctly weird and 'ceremonial' to me.