Construction Progress of Chinese Meridian Project Phase Ⅱ

The Chinese Meridian Project (CMP) is the Space Environment Ground Based Comprehensive Moni-toring Network of China, a national major science and technology infrastructure project. The CMP consists of the Space Environment Monitoring System, Data Communication System, and Science Application System. Its con-struction has been divided into two steps: the Phase I was from 2008 to 2012; the Phase Ⅱ started at the end of 2019, expected to be completed at the end of 2023. Beyond 2023, the CMP as a whole will be in operation to make observations. This report introduces the construction progress of CMP Phase Ⅱ in the past two years, covering the construction progress of both the Data Communication System and the Science Application System. As for the Space Environment Monitoring System, this report mainly gives an introduction to the construction progress of large-scale advanced monitoring equipment, such as, the solar radio telescope, interplanetary scintillation tele-scope, incoherent scatter radar, high frequency radar, MST radar, and large-aperture Helium Lidar. In addition, this paper presents the construction plan for the next two years and the future outlook as well.