Captain America: The First Avenger the film would not be released in China because of a policy limiting the number of foreign films screened there each year, but it eventually opened there in the second weekend of September. Days before the film's release, a teaser trailer for "The Avengers" that served as a post-credits scene of "Captain America: The First Avenger" was briefly leaked online. "Entertainment Weekly" speculated it came from a preview screening and described the footage as "shaky, fuzzy, flickering and obviously filmed on a cell phone". "Captain America: The First Avenger" was formatted and screened in IMAX for the first time on
Captain America: The First Avenger Times Square on April 23, 2011. The film features nearly 1,600 visual effects shots, which were split between thirteen different companies. To achieve the appearance of the skinny, pre-serum Steve Rogers, director Joe Johnston stated that he used two major techniques: Captain America's shield, which serves as both a defensive tool and a weapon, came in four types: metal, fiberglass, rubber, and computer graphics (CG). Prop master Barry Gibbs specified that "We had the 'hero shield,' which was made of aluminum, for our beauty shots [and] close-up work. We then created a lighter shield that was aluminum-faced with a fiberglass