Thalictrum kiusianum is certainly the other obvious one to compare to. If you do a Google search of either species, I think you'll see that most photos of
both show pink flowers (sepals, actually).
eFlora of China says that
Thalictrum ichangense has white flowers:
http://www.efloras.org/florata...
I think the leaves on your plant match
Thalictrum ichangense ("apex obtuse to rounded, 3-lobed; lobes toothed at margin"), as compared to what appear to be much more prominently toothed leaves on
Thalictrum kiusianum... for which, unfortunately, I can't find a description (so this is going from Google photos).