Child health and nutrition are key goals under the 2030 Sustainable Development Agenda. Currently, around 45% of deaths among children under five years of age are linked to undernutrition. These mostly occur in low- and middle-income countries. In June 2023, the Chinese Academy of International Trade and Economic Cooperation (CAITEC) and the UNICEF China Office convened a forum on “Supporting Child Nutrition and Sustainable Development Through International Co-operation”. Participating experts discussed China’s experience, and the potential presented, and challenges faced by Chinese product, in boosting the improvement of child nutrition in impoverished regions of Africa and Asia. The case study is a summary of the views presented at the forum. The content covers global needs and challenges in child nutrition, the importance of complementary food supplements in improving child nutrition, effective practices implemented by the international community to promote the use of complementary food supplements, advantages and on-the-ground results of China’s YYB, challenges to taking the YYB international and recommendations for driving product internationalization of the YYB.