Inclusion Criteria:  inclusion criteria of dyslipidemia with SKYD and PDR. (1) subjects with dyslipidemia in accordance with the diagnostic standards and TCM syndrome diagnostic standards, (2) ranged in age from 20 to 80, (3) who signed the informed consent, and (4) without lipid-lowering medications. inclusion criteria of NC. (1) healthy subjects, (2) ranged in age from 20 to 80, (3) who signed the informed consent.  Exclusion criteria:  Exclusion criteria of dyslipidemia with SKYD and PDR. The exclusion criteria were composed of four criteria and a patient was excluded if they fails on any of the criteria. Mentioned criteria were: (1) secondary dyslipidemia (causes of dyslipidemia include but not limited to hypothyroidism, nephrotic syndrome, chronic renal failure, liver diseases, diseases of the hematopoietic system, adrenal-corticosteroid or contraceptive-drug induced dyslipidemia); (2) aphasias, and patients had difficulties to speak or unable to extend tongue for tongue observation; (3) patients with psychosis or unable to answer questions properly; (4) patients with acute infectious diseases or in the acute disease states (such as acute myocardial infarction, acute cerebrovascular disease, etc.), as well as pregnant women.