Hi Littlelittle, Wow 19mm - that is a lot bigger than any Carabidae I have seen in Hong Kong.
This spring on Lantau, hasn't been very good for Carabid beetles I have had seventeen species. Just in case you want to see some of the photographs, the species are:
Craspedophorus mandarinus (Schaum.)
Stenolophus quinquepustulatus (Wiedermann 1827)
Drypta lineola Chaud
Platymetopus flavilabris (Fabricius 1798)
Chlaenius junceus Andrewes 1923
Chlaenius hamifer Chaudoir
Plus Lebia sp. x2 spp, Harpinae sp x 4 spp.and Carabidae sp x 3 sp.
Kind regards PAul