Kind of an odd puzzle, if you ask me. It's interesting to know that those words come from the Chinese, but it all seemed a bit random. Still, the Chinese added a nice variety of words into the grid. KUMQUAT (1A: *Relative of an orange) is good, but the resulting QID (quater in die?) isn't something that I am familiar with, even though I can figure out the Latin. And while we're up there in the NW, we thought UTERI was weak. And, really, who says KALES (1D: Nutrient-rich cabbages)?
I did like some of the clues, especially 25A: Race with lots of passing (RELAY), and 33D: Foofaraw (TODO). I am amused by the various words that the constructors come up with for "to do" and "ado." Like David Steinberg's choice of "Rowdydow" for "ado," for example. Perhaps you have your own favorites.