It took four years to get the script, and two years of filming and editing.
The DVD (in United States) is dubbed in English, rather than using subtitles to translate.
Based on a well known fairy tale book by Tianyi Zhang written in 1957.
Wang Bao's school scenes in Hangzhou were shot in Mr. Zhang Tianyi's primary school.
The directors auditioned many children before finding Zhu Qilong for the role of Wang Bao.