It was originally made to promote their sauced duck product. The team saw other AI-generated "fox repays kindness" videos and thought the classic fox gratitude story was too cliché. So they added a twist -- replacing the food left for the fox with their sauced duck, turning the fox into a "revenge" character. It unexpectedly went massively viral.

Entirely generated with AI tools (such as Jimeng, Xiaoyunque, etc.), imitating the retro style of 1970s Shaw Brothers martial arts films (film grain, old-school wuxia atmosphere). From idea to the first video, it took only about 5 hours, with very low cost (reportedly less than 40 RMB).

Can try search by chinese word (你是否在雪山救过一只狐狸)

Above information is from AI GROK.

(As recently there more & more different version of it came out from Facebook , THREADS,YouTube)