I think the Chinese call anything like a dha a "Dai dao". This is one I have posted before that I think is Burmese (Shan?) in style but was certainly found in Yunnan. The blade is a slim "willow leaf" style similar to familiar Chinese blades but slim and light in comparison. I have a Vietnamese daarb with almost the same blade. It seems to be a more or less standard form, at least in a smaller example like mine.
Josh