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Compared to satellites,ground-based monitors are cheap,convenient,and provide continuous real-time data.These monitors are important tools for studying the response of near-Earth space to solar activity and for predicting space weather.We have developed a ground-based program to monitor the geospace environment.The Meridian Space Weather Monitoring Project consists of 15 stations forming two orthogonal lines,one along the longitude 120°E and the other along the latitude 30°N.It has radio,optical,sounding rocket,and geomagnetic (geo-electric) field monitoring instruments.This network fully utilizes the geographic location of the Chinese landmass,extending from northern Mohe,across Beijing,Wuhan,and Hainan,and then to the Zhongshan Station in Antarctica.The instruments are used to measure key space environment parameters such as the baseline and time-varying geomagnetic field and the state of the middle and upper atmosphere and ionosphere from 20 to 1000 km.The project began taking data in 2012 and will remain operational for at least 11 years.This talk will give the overview and new development of the Meridian Project,and present some preliminary observational results.