The chest impedance method non-invasive hemodynamic monitoring system is the first in China and is recommended by the International Society of Hemodynamics (IHS). It has been active in the field of professional medicine for many years, especially in ICU, cardiology, anesthesiology, etc. It has rich experience accumulation. At present, based on the consistent level of invasive and non-invasive hemodynamic measurement results, the technology has been extended to: assessment of cardiac function during admission and discharge, and health management of pre-hypertension, asymptomatic, and preclinical cardiac insufficiency, in related clinical practice Received wide acclaim.