The so-called HS course, that is, heartsaver, mainly includes the most basic cardiopulmonary resuscitation skills, the training content of AED (automated external defibrillator), and some teaching contents of common first aid in internal surgery. At present, many big cities in China already have authorized training bases of AHA. You can check whether your place has the information of its authorized training base to decide whether to participate in the training in the end.