The film is based on real history, and the script has been polished for four years and revised more than 20 times. Billy august said that when he first saw the film, he thought it was China's version of Saving Private Ryan. The most valuable thing about this theme is the care and love for human nature. In addition, it has a global vision. In order to come to China to direct this film, he cancelled several film contracts, hoping to make it a perfect film.
Billy august said that this cooperation program began six years ago. This love story happened in China during World War II deeply touched him. The script was prepared for a year and a half, and he personally went to the countryside of China to experience life. The filming process was very enjoyable, which made him love China culture more.