In adults (>18 years) with any one or more of the following risk factors for diabetes: 1, age ≥40 years; 2, history of impaired glucose regulation; 3, overweight (BMI ≥24 kg/m2) or obese (BMI ≥28 kg/m2) and/or centrally obese (waist circumference ≥90 cm in men and ≥85 cm in women); Jin Nan, Department of Endocrinology, Beijing 301 Hospital 4 4, sedentary lifestyle; 5, family history of type 2 diabetes in first-degree relatives; 6, women with a history of delivery of a large child (birth weight ≥ 4 kg) or a history of gestational diabetes; 7, hypertension [systolic blood pressure ≥ 140 mmHg and/or diastolic blood pressure ≥ 90 mmHg (1 mmHg = 0.133 kPa)], or receiving antihypertensive treatment; 8, dyslipidemia [high-density lipoprotein cholesterol (HDL-C) ≤ 0.91 mmol/L (≤ 35 mg/dl), triglycerides ≥ 2.22 mmol/L (≥ 200 mg/dl)], or are receiving lipid regulating therapy; 9, patients with atherosclerotic cardiovascular disease; 10, patients with a history of transient steroidal diabetes mellitus. Patients with polycystic ovary syndrome (PCOS); Patients on long-term antipsychotic and/or antidepressant therapy. Among all of the above, patients with abnormal glucose regulation are the most important high-risk group for type 2 diabetes, with 1.5% to 10.0% of IGT patients progressing to type 2 diabetes each year. Regular glucose screening is recommended for the above high-risk groups.