Based on qualitative and quantitative data collected from an investigation of the flagship National Teacher Training Project (NTTP) in China, this study compares the impacts of teacher professional development (PD) programs located at different distances from the participants' workplaces. The study argues that local and nonlocal programs play different roles in teacher PD. While local programs are conducive to teachers' mastery of context-specific knowledge and skills that are directly connected to subject teaching, nonlocal programs are crucial for teachers' continuous professional development in the long term. The two types of programs are supplementary to each other, and teachers need access to both types of programs.