The war film The Battle at Lake Changjin which released on National Day in 2021，earned 5.772 billion yuan at last. It is not only the box office champion of 2021 in China，but also the top of the box office in China’s movie history by breaking the record of Wolf Warriors 2’s 5.695 billion yuan box office. The box office success of The Battle at Lake Changjin shows that China’s new mainstream blockbusters have entered a new stage of development with ultra-high standards of industrial production. It not only improves the artistic expression of war films in China，but also arouses the common memory and emotional resonance of audiences with its faithfulpresentation of history. From the production mode，creation techniques，marketing and other aspects，The Battle at Lake Changjin has immeasurable revelation to the current Chinese film industry，and represents the highest production level of Chinese film industrialization.