Bob - It's a Common Greenshank. Bill coloration is variable - pale base to the bill can be shown by both Common & Nordmann's. 
But the key feature, apart from jizz, is the pattern of the upperparts. Compare your bird with the following: 
http://orientalbirdimages.org/se ... Bird_Image_ID=76008
Nordmann's lacks the extensive dark notching of Common.
David
www.birdinghongkong.com