This two-center study retrospectively analyzed the follow-up data of children with systemic lupus erythematosus (SLE) in our center (the Children's Hospital of Chongqing Medical University) and the Children's Hospital of Nanjing Medical University, grouping the patients into two observation groups-low disease activity status Group (LDAS group) and never reached low disease activity group (Never LDAS group). We would analyze the risk factors of SLE that patients cannot reach LDAS by comparing baseline data and treatment conditions of the two groups. Meanwhile, we would evaluate the SLE clinical indicators, SLE disease activity, organ damage, and disease remission state at the end of the follow-up of the LDAS group, in order to assess the clinical value of T2T strategy in the treatment of children with SLE, optimize the treatment of children with SLE, andimprove the prognosis.