Subject: Western man
Date: c.1865. The back of the card gives the photographer's name as Kai-Sack, and his address as "Opposite Stag Hotel, 109 Queen's Road". The seller dates this to c.1867, but HOPIC only has firm records of Kai Sack in business from 1864 til 1865 (see https://gwulo.com/node/31857), so I've dated it to a couple of years earlier.
Photographer: Kai Sack
Format: carte de visite
Photo courtesy of The Pottinger Hong Kong hotel.