Olaf Oliviero Riemer [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons
Asia. China where it breeds and then a southward movement to spend the non-breeding period in SE China, Taiwan, Vietnam and Thailand to Indochina.
Least Concern
NBN atlas has 9 records as at end 2024. Map Here