HA Ji-won acquired motorcycle and scuba licenses to enhance her understanding of her character. No stunt double was used for any of her scenes.
This film took three years to make.
80% of this movie was shot against green or blue screens.
The crew for this movie was made up of 150 people.
Sector Seven was the title of one of the film scripts given to Ha Ji-Wons character Gil Ra Im in her 2010 film Secret Garden for her to be the lead actresses stunt double
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