Thank you very much Vicky..
XT was ringed on 15-Nov-23 at Mai Po. Only 1 record from you earlier in Dec-23 at Nam Sang Wai.
ST was originally ringed on 8-Dec-2018 at Mai Po and fitted with the leg flag M8. It was recorded in Shenzhen in Nov-19, and at Mai Po in Aug-Sep 22. When it was retrapped at Mai Po in Sep-2022, its broken old flag was replaced with ST. This is the first sighting after Sep-2022
The 3rd bird is "05", ringed at Shenzhen Futian Nature Reserve on 30-Apr-2022.
The 4th bird seems to be carrying plain flags (no code on it), which means that it is a bird ringed before we start using flags with code in Aug-2010. Great find, it is at least 13 years old.
Katherine