Blockers of renin angiotensin aldosterone system (RAAS) such as angiotensin converting enzyme inhibitors (ACEI) or angiotensin II receptor blockers (ARBs) are considered the standard of care in treatment of Proteinuric Chronic Kidney Disease. However, these agents lead to incomplete renal protection. The purpose of the study is to investigate the antiproteinuric effect of adding Dapagliflozin to the standard of care in children with proteinuria. In this study, participants were randomly assigned (1:1) to receive ACEI+Dapagliflozin (5mg or 10mg, based on body weight) or ACEI only once daily for 24 weeks. Prespecified outcomes includes changes in 24-hr proteinuria, albumin, eGFR (estimated glomerular filtration rate), blood pressure, body weight and so on.