The correct location for adult external chest cardiac compressions is 1/3 of the lower middle border of the sternum on the midline or 3-5 cm above the raphe. If you are not a professional doctor, effective compressions or hammering at the lower middle edge of the sternum will be effective, but the specific strength and method should be correct. As long as there is no chest fracture or general paralysis, it is possible to perform chest cardiac compressions, while performing chest cardiac compressions, you need to cooperate with artificial respiration for first aid, and call the emergency number.