It appears that Skyfall‘s second unit was shooting in Shanghai in China for three days last week, according to a number of reports that have surfaced online. According to a report on James Bond Brasil (and translated by Google Translate):
…filming of 007 – Skyfall began in Shanghai on the evening of January 17 (Tuesday) and extend for two more days on the highway neon city, as is known. It is known that the main cast of the film was not present on the set, only the second unit of the film.
Thanks to James Bond Club Schweiz for permission to republish their photos.