A.very good,Net monthly household income of 40,000RMB (£4,700) or more
B.Good,Net monthly household income of RMB20,000 (£2,300) or more
C.Fair,Net monthly household income of RMB10,000 (£1,200) or more
D.Poor,Net monthly household income of RMB10,000 (£1,200) or less