Heroes of the Eastern Skies (; pinyin: "jianqiao yinglie zhuan"), is a Chinese war drama filmed in Taiwan, R.O.C. and based on the true story of a small group of Chinese flying aces in 1937 at the beginning of the Second Sino-Japanese War, specifically depicting events in the Battle of Shanghai, Battle of Nanking and the Battle of Taierzhuang; the movie was released on 7 July 1977 in commemoration of the &lt;a href="Marco%20Polo%20Bridge%20Incident"&gt;"7/7 Incident"&lt;/a&gt; which sparked the start World War II in Asia.