The global economy has been adversely affected by the COVID-19 pandemic, leading to setbacks in development progress. Against this backdrop, donor countries have increased their expenditure on medical aid as part of their foreign assistance. As an emerging donor from the developing world, China has also been actively involved in providing medical assistance to other countries since 2020. This paper intends to investigate and elucidate China's motivation to offer medical aid to other countries amid the COVID-19 pandemic. To this end, it utilizes a combination of quantitative and qualitative research methods. Specifically, the Tobit model is employed to conduct regression analyses on China's medical assistance during the pandemic. Additionally, two case studies, namely Chinese aid to Pakistan and the Democratic Republic of Congo, are examined to gain insights into the specific motivations driving China's medical aid. The results of this paper indicate that China's motivation for providing medical assistance during COVID-19 is multifaceted, including self-interested economic and political-diplomatic factors rather than purely altruistic motives. Furthermore, the allocation of China's medical aid is significantly influenced by whether the recipient country is involved in the Belt and Road Initiative.