Insight-HXMT is China's first X-ray astronomy satellite.It was launched on 15 June 2017 and is currently in service smoothly.Insight-HXMT has been used to scan the Galactic plane repeatedly,making pointing observations to neutron stars and black holes,and monitor the whole sky continuously in the MeV band.Insight-HXMT is also very flexible in making ToO observations,with the response time from about 3 hours to within a day.So far more than 50 refereed publications have been made with data from its observations;many more publications have used the data or results of Insight-HXMT one way or another.The scientific impacts of Insight-HXMT have been growing rapidly since launch.We expect Insight-HXMT to continue to operate for several more years.