三城一区

Three science cities and one demonstration area

即中关村科学城、怀柔科学城、未来科学城和创新型产业集群示范区，是北京市建设国际科技创新中心的主平台。“三城一区”集聚了全市6成左右的研发人员和研发费用，以不足6%的土地面积贡献了全市三分之一的地区生产总值。

They refer to Zhongguancun Science City, Huairou Science City, Beijing Future Science Park and the Demonstration Area for Innovation-based Industrial Clusters. They serve as pivotal platforms for building Beijing into an international innovation center. Together, they house about 60% of the city's R&D personnel, and account for almost 60% of Beijing's R&D spending. Despite occupying less than 6% of the city's land area, they contribute to one-third of the city's GRP.