Inclusion Criteria:  Age 18-65 years CKD stage 3-4 and not on dialysis (eGFR: 15-59ml/min/1.73m2) BMI ≥ 25 kg/m2 Good reading and comprehension skills, simple smartphone operation and no communication difficulties Signed informed consent  Exclusion Criteria:  Pregnant and breastfeeding End-stage diseases Acute and active diseases such as gastrointestinal bleeding or acute infections, serious decompensation with diseases such as cirrhosis decompensation stage, malignant tumor, serious heart and lung diseases, severe primary diseases of hematopoietic system, severe hypertension (systolic blood pressure ≥200mmHg, diastolic blood pressure ≥120mmHg) and difficult to control blood pressure, within 3 months after major surgery, such as open surgery Mental patients Using medium-high doses of hormones and immunosuppressants Participating in other researchers Taking other dietary therapies, undergoing weight loss treatment Vegetarian Type 1 diabetes or insulin treated type 2 diabetes