Data show that China’s current public CPR skills penetration rate is far below 10%, the success rate of resuscitation is less than 1%. If someone around you suffers a cardiac arrest, please remember: chest compressions! Chest compressions! Chest compressions! –This is the most important part of cardiopulmonary resuscitation (CPR) for the layperson, and almost everyone needs to know how to do it. However, the fact is that compared to the 70% success rate in the United States and 50% in Japan, the success rate of sudden cardiac death resuscitation in China is less than 1%! When the person around you suddenly falls to the ground, as a bystander, you should perform cardiopulmonary resuscitation (CRP) according to the following procedure: and start chest cardiac compressions as soon as possible: Operation method: kneel on the patient’s side, fold the palms of both hands, fingers crossed and interlocked, palm root placed at the midpoint of the line of the double nipples in the center of the chest, arm straight, continuous forceful and rapid vertical compressions, frequency 100 to 120 times per minute, compression depth 5 -6 cm (children and infants should reach 1/3 of the anterior and posterior diameter of the thorax, which is approximately equivalent to 4 cm for infants and 5 cm for children).