Policy mobility research has become an important subfield in political geography. Overseas industrial zones serve as burgeoning case areas to testify the theoretical framework of policy mobility, whose development is a key component of the Belt and Road Initiative and an expected experimental way to promote inclusive globalization. The highlight of this paper is the role that the partnership plays for multi-scalar actors in the process of policy mobility when it comes to the overseas industrial zones. In this paper, we interpret Thai-Chinese Rayong Industrial Zone's evolving strategies and development trajectory through two interrelated conceptual lenses, namely, policy mobility and partnership. It is emphasized that the policy mobility of overseas industrial zones is a multi-scalar process of gradual advancement, and the partnership plays an important role in policy mobility. This paper systematically analyzes the institutional background and main partners of Thai-Chinese Rayong Industrial Zone. Policy mobility in terms of tax, land, talent and other elements are shaped and accelerated by the interactions and partnership between Thai and Chinese central governments, local governments, and leading enterprises. Finally, the policy recommendations are proposed for the sustainable development of China's overseas industrial zones in the context of Belt and Road Initiative.