Anna Zhou was a UNIT soldier of a Chinese branch in the early 21st century.
Anna survived the Dalek attack on the Chinese UNIT branch and was present at Osterhagen Station 5. Her attendance, however, was irrelevant as Martha Jones of Station 1 was teleported to the Crucible shortly after her arrival, leaving only two Osterhagen stations online. Fortunately, the Tenth Doctor and his various companions managed to destroy the Daleks and restore Earth to its proper place in the universe, rendering the Osterhagen stations unnecessary. (TV: Journey's End)