The original plot of the film is: In order to recover the debt owed by the United States to China, the Chinese People's Liberation Army invaded the west coast of the United States, and the American military and civilians rose up in resistance. The revised plot is: In order to defeat the enemy, the Korean People's Army launched an invasion of the west coast of the United States, and the American military and civilians rose up in resistance. Controversy In April 2010, the Global Chinese Artists Alliance, the New York Jiangxi Association, the Asian Education Association and other Chinese American associations protested at the United Nations Building, Times Square and New York City Hall, and then established a website to promote and oppose racial discrimination and anti-Chinese thinking. The original footage of the film includes the Chinese People's Liberation Army patrolling the occupied areas of the United States, and American teenagers shouting "Kill the Chinese!" etc. New York Chinese Congressman Grace Meng, President of the Global Chinese Artists Alliance Yao Jicheng, New York Jiangxi Association Tu Lingling, Zhejiang General Association, World Federation of Chinese Famous Doctors and others sued MGM in the US federal court, demanding a ban on filming and screening. On June 29, 2011, Yang Yujun, a spokesman for the Chinese Ministry of Defense, answered questions about the film and said: We believe that his behavior is purely fabricated and sensational, which is absurd and ridiculous. The script of this film during filming tells a fictional story of the Chinese People's Liberation Army invading the United States. The film was originally scheduled to be released on November 14, 2010, but due to financial reasons of MGM, the release date was postponed to November 21, 2012. The distributor claimed that due to concerns about the difficulty of distributing the film in the Chinese market, it temporarily decided to change the plot of China's invasion of the United States to North Korea's invasion of the United States during post-production, which caused controversy in the American media. The main content of the modification was to re-make the fictional historical background description in the opening part, and use digital technology to change many Chinese symbols that appeared in the film to North Korean symbols. In fact, due to the strict access review of the introduction of foreign films in the Chinese film market, the subject matter of this film has no possibility of being released in the Chinese market even after being modified. The producer's modification is more to avoid irritating the Chinese government and its film censorship department, and affecting the release of its other products in the Chinese market. Because the producer MGM changed the invasion of the Chinese People's Liberation Army into the invasion of the North Korean People's Army, the American media also criticized it, believing that this move was to please China. The American media published articles expressing dissatisfaction with Hollywood's flattery of China. In order to eliminate the Chinese military elements in the film, MGM spent $1 million to remove the Chinese national flag and military flag from the film. Because of its original content, it was difficult to find Chinese actors during filming, so most of the Chinese soldiers in the film were played by Korean Americans. After the plot was changed, the characters they played became North Korean soldiers.