The chapter briefs on the general concepts that are involved in forest carbon projects, such as afforestation/reforestation (A/R), project boundary, and forest carbon pool. It elaborates on the development process of CDM forest carbon projects and China’s GHGs voluntary emission reduction project, respectively; compare cooperative development and independent development as two development modes. Using project design document (PDD) of CDM A/R projects as an example, it describes in detail 10 major steps in the development of forest carbon project, including project identification, project boundary determination, crediting period selection, baseline investigation, baseline scenario recognition and additionality demonstration, leakage, participatory rural appraisal, environment impact assessment, biodiversity survey, and A/R operation and design.