From July 5 to July 6, 2022, Dr. Nie Yufeng of the team attended the COST-G meeting. At the meeting, Dr. Nie Yufeng made a report entitled "global gravity filed estimation from LEO satellite observations at Tongji University". The report introduced the gravity field inversion conducted by the gravity team of Tongji University using low orbit satellite observation data, which provided a reference for the current research hotspot of global gravity field inversion, and has considerable scientific significance and application background. There were nearly 20 relevant academic reports at the conference. Participants discussed and learned from each other, which enhanced academic exchanges between universities and units.