 The investigators are registering Lupus nephritis LN and developing a LN database in China. Patients demographic characteristics including age, gender, height, weight, BMI, smoking, drinking, and education etc., clinical characteristics including systolic blood pressure, diastolic blood pressure, and lab measurements of whole blood, serum, urine etc., complications, drug information at the baseline will be collected. Patients will be follow-up every year, the demographic and clinical characteristics, complications; drug information of patients will be collected at each visit. We will also record the outcome at each visit, such as mortality including all-cause mortality and cardiovascular disease mortality, end-stage renal disease ESRD or serum creatinine doubling. The patient survival and renal survival will be compared using the LN database. 