Thank you for reporting the sighting.
D11 was ringed at Mai Po (Gei wai #8) on 16 November 2018. It was a first winter male (ie hatched in 2018).
This is the first resighting of this bird since ringing. It is great to know that it has returned again to Mai Po this winter.
Sightings like this help us to understand bird movements, so please keep posting them if you see any ringed birds.