Averaged profile and the dynamic spectrum diagram of a burst from FRB 20200317A, detected with FAST L-band (1.05-1.45 GHz) 19-beam receiver. The data in each frequency channel are incoherently de-dispersed with DM=850.7 pc/cc. The arrival time of burst peak at the solar system barycenter (TDB) is MJD = 58925.9001184188 (correcting to an infinite frequency).