to make a chinese correlation, in November I've been in central Guangxi, at a place where I'm going very reguraly, I've recorded Red-billed Leiotrix for my first time there (after 6 trips at different time of the year ), at a few sites I've visited very often in the past. A flock of them was seen in a habitat that do not correspond to the species as well indicating some birds in movment I guess.The nearest population I know is about 200 kms from there, so I wont be surprised that this species is subject to local movment elsewhere in winter.
All the best,
Jonathan