Chinese security forces are keeping a close eye on Beijing's Olympic sites in the run up to August's games. This short film of the Olympic stadium in Beijing was shot on the day it opened to international media for the first time. Filmed and edited by guardian.co.uk staff photographer Dan Chung. Shot on a Sony EX1. Edited in Final Cut Pro and graded and converted to black and white using Magic Bullet Looks. See guardian.co.uk/world/china for more China coverage by the Guardian.