Ultra-high frequency ultrasound technology (20-100 MHz) can clearly distinguish the arterial intima and media layers, and can simultaneously meet the needs of examining the carotid artery and peripheral arteries, enabling earlier and more accurate detection of vascular damage in pre-diabetic individuals. Therefore, this study aims to establish the normal values of arterial intima and media thickness measured by ultra-high frequency ultrasound in healthy Chinese adults, providing quantitative reference for the early diagnosis, severity assessment, and efficacy observation of arterial diseases. Meanwhile, by applying ultra-high frequency ultrasound, this study intends to clarify the changes in arterial intima and media thickness in pre-diabetic populations and explore the influencing factors, so as to provide reference for the early prevention, diagnosis, and treatment of pre-diabetes and cardiovascular complications.