Regardless of whether one is a medical professional or not, one can participate in AHA first aid training, and it should be said that participating in such training is quite beneficial from two aspects. On the one hand, it is of practical significance that the number of sudden cardiac deaths in China is up to 540,000 per year, and improving the bystander's mastery of cardiopulmonary resuscitation (CPR) through participation in this kind of training will improve the prognosis of the patients; on the other hand, the certificate of training can be used as a kind of job-seeking assistance.
But the most authoritative organization for CPR training is the AHA, which provides CPR and automated external defibrillator (AED) instruction and testing, and issues a 2-year certificate in basic life support. If you are really interested in CPR, I personally recommend that you attend their training, as AEDs are becoming more and more popular in China, which is good for you and good for yourself, to some extent.