Clearly Kentish Plover, but observations, or better still photographs like this of Kentish-type Plovers from "sandy substrates" such as those at Pui O and in parts of Sai Kung may well produce records of the still rather mysterious "White-faced Plover" (see
http://www.surfbirds.com/Features/plovers1108/malayplovers.html)
Whatever happened with the bird photographed on Lamma two or three years back when the "White-faced Plover" story was just breaking?
Mike Turnbull