I, too, think this is a "Bama" dha, though the fittings have a Chinese flavor to them. Still, it could very well have come geographically from Yunnan, as ethnic groups straddle the border, and swords seem to migrate even further. I do not think that the tip is re-worked. Though I have never seen one precisely like this, you do get some exotic ones:
The long, curved handle is sort of unusual, too, for that style. Yet another sub-type, or possibly hybrid style. It never ends.
