The journal Chinese Science: Physics, Mechanics, Astronomy published research conducted by a joint team comprising postdoctoral researcher Ziwei Wu from the National Astronomical Observatories' Pulsar and Gravitational Physics Group, along with researchers from the Max Planck Institute for Radio Astronomy in Germany, the Advanced Institute of Astronomy and Astrophysics at Beijing Normal University, the University of Nevada in the USA, and other institutions. This study was carried out through the priority major project Search for Fast Radio Bursts and Multi-wavelength Observations using the Five-hundred-meter Aperture Spherical radio Telescope (FAST). By analyzing the correlations of the fast radio burst FRB 20220912A signal in both time and frequency domains, the team made the first discovery of scintillation arc phenomena within fast radio bursts. This work indicates that the MHz bandwidth and minute-scale variations exhibited by fast radio bursts in the frequency domain are caused by interstellar propagation effects. The discovery of the scintillation arc phenomenon provides an entirely new method for studying the propagation medium of fast radio bursts and their potential orbital motions.