Nice pictures.
Do you have any more that show the last part of the ring? From what can be seen on this, the number on the ring is LAB3xx (x represents an unread number). The first x appears to be either 8 or 9 but I'm not entirely sure.
Based on that information, we can tell that this is one of four birds ringed in October 2011 - a clear view of the lasat two numbers would confirm which one.
Where abouts at Mai Po was it seen (which gei wai)? It would be interesting to understand local movements around the reserve from our ringing site in #8b reedbed.