In the final battle of the Songhu Campaign in 1937, the "Eight Hundred Warriors" were ordered to defend the Sihang Warehouse in Shanghai, and they fought tenaciously for four days and four nights with fewer enemies than the enemy. The movie "Eight Hundred", directed by Guan Hu, is the first commercial film in Asia to be shot entirely with IMAX cameras. It will be released in theaters nationwide on August 21, 2020.