Clinical Validation of mμSORS for Noninvasive Blood Glucose Detection

Inclusion Criteria for healthy subjects: * Male or female. * Aged between 30 and 60 years. * Fasting blood glucose (FPG) \< 6.1 mmol/L and glycated hemoglobin (HbA1c) \< 5.7% during the screening period. * There are no scars, obvious pigmentation and other factors that interfere with the detection of the palm skin to be tested. * Confirmed as healthy based on the results of physical examination, medical history, vital signs and clinical laboratory tests. * Fully understand the nature, significance, possible benefits, possible inconveniences or potential risks of this research, and should also understand the research procedures, be willing to complete the entire research process, and provide written consent form. Inclusion Criteria for patients with type 2 diabetes: * Male or female，previously diagnosed type 2 diabetes. * Aged between 30 and 60 years. * Fasting plasma glucose ≥ 6.1 and \< 13.3 mmol/L. * There are no scars, obvious pigmentation and other factors that interfere with the detection of the palm skin to be tested. * Fully understand the nature, significance, possible benefits, possible inconveniences or potential risks of this research, and should also understand the research procedures, be willing to complete the entire research process, and provide written consent form. Exclusion Criteria for healthy subjects: * Any history of serious clinical diseases such as circulatory system, endocrine system, nervous system, digestive system, respiratory system, hematology, immunology, psychiatry or metabolic abnormality, or any other disease that can interfere with the test results, which the investigator considers significant. * Alcohol dependency or drug abuse. * Those who have participated in clinical trials of other drugs within 3 months before screening (since the last visit of the previous trial). * Pregnancy or lactation period. * Difficulty in venous blood collection or fainting of needles or blood. * Other circumstances that the investigator considers inappropriate to participate in the study. Exclusion Criteria for patients with type 2 diabetes: * Type 1 diabetes, monogenic mutant diabetes, pancreatic damage, or secondary diabetes of other causes should be excluded. * Severe structural heart disease, such as congenital heart disease, rheumatic heart disease, hypertrophic or dilated cardiomyopathy, chronic congestive heart failure (NYHA≥III); acute myocardial infarction within 12 months before enrollment; history of severe liver or kidney dysfunction (eGFR \< 60 ml/min/1.73m2 calculated by MDRD formula at screening period); and mental disorders, etc. * With a history of acute complications of diabetes within 3 months before enrollment; or severe diabetes-related complications. * Alcohol dependency or drug abuse. * Those who have participated in clinical trials of other drugs within 3 months before screening (since the last visit of the previous trial). * Pregnancy or lactation period. * Difficulty in venous blood collection or fainting of needles or blood. * Other circumstances that the investigator considers inappropriate to participate in the study.