Abstract Problem Indigenous food systems can affect multiple aspects of Indigenous people’s health and contribute to more efficient, sustainable, resilient, and equitable food systems. However, although tens of Indigenous groups live in China, very few projects have targeted their traditional or Indigenous food systems and ingredients. Description of the problem The main purposes include documenting traditional and Indigenous foods and medicine, building multiple social media for public impact, encouraging Indigenous youth participation, and advocating a more sustainable food system in China Results With the collaboration of Good Food Fund China, the project recruited 257 volunteers from 27 ethnic groups. The project collected 418 traditional food ingredients, produced 18 TikTok short videos to introduce Indigenous ingredients with the maximum number of views in a single post of more than 100,000, organized 16 Indigenous food culture knowledge webinars, translated 14 international case studies in Indigenous food systems with the permission of authors, and published 16 articles about Indigenous food ingredients and culture in the writing camp. The online lives also received more than a million total views. The results were presented at COP26 and COP28. More results will continue to be presented to the public through articles, books, academic papers, documentaries, short videos, online webinars, and other forms. Lessons The project demonstrates the potential to use online platforms to advocate and document sustainable food systems and biodiversity through youth participation. More similar projects can be designed in different parts of the world to support sustainable food systems transformation and ignite down-to-earth changes. However, funding and publication channels are still difficulties in the project. Key messages • The first national level youth participation project to document Indigenous food biodiversity in China. • Take advantage of social media and the internet for public impact.