Dr.Yijian Gu is the attending physician of Dr. Smile Medical Group International Vein Center. trained under the renowned vascular surgery expert Dr. Zhang Qiang in minimally invasive treatment techniques for lower limb varicose veins, serves as a mentor at the Sijun International Vein Disease Academy and as a training instructor for the CHIVA treatment centers in the western region. A regular speaker at the International Vein Disease Forum, they have delivered multiple keynote speeches, sharing their research and clinical experience in the hemodynamics treatment of varicose veins. They are a medical editor for the “International Vein Disease Forum” and a member of the expert editorial committee for “Global Advances In Phlebology” and “Venous Update,” publishing the latest medical information and research findings in the field of vein diseases. Actively engaging in academic exchanges and collaborations, they specialize in diagnosing and treating common diseases of the lower limb venous system, including varicose veins, deep vein thrombosis, venous ulcers, and capillary dilation. With a focus on hemodynamic research and popularization of lower limb venous diseases, they are adept at comprehensive ultrasound hemodynamic assessments of the lower limb venous system, including venous reflux and obstructive diseases. Their research into complex lower limb varicose veins allows for a comprehensive analysis and judgment of patients’ conditions. They focus on minimally invasive treatment for lower limb varicose veins and the CHIVA technique based on hemodynamic assessments, having developed and accumulated a wealth of clinical cases in lower limb varicose vein CHIVA surgeries.