Out-of-hospital cardiac arrest (OHCA) is an important public health issue. Chang Gung Memorial Hospital, a university affiliated medical center in Taoyuan city, northern Taiwan, actively cooperated with government policy with 250 automated external defibrillators (AED) donation and implementation around many public places during period of 2012 to 2014. In addition, nearly 200 courses of first aid education and training of citizen were provided in the first and 52 courses in second program. According to the literature, a successful public AED implementation plans proceed with the following requirements: continuing education and training to improve and retain skills; maintaining a proper long-term operation of AED equipment;continued data collection of actual cases for analysis, quality control and feedback. In order to maintain the ability of emergency medical response among these 200 and more AED recipient areas, quality assurance with regular follow-up by medical directors, providing professional advice and feedback, repeat education and training should be proceed.

The aim of study is to continue the research development of the previous projects. First, in the previous research projects, investigators were found that the depth and rate of compression will fall behind the current standards by the American Heart Association after one year of training. The E-learning learning website has been completed, so the new project will launch parallel study and tracking of online (AIR) and field (BASE) stimulation teaching for a 2-year period. The participants would be stimulated at 6 and 18 months with short term on-line or base teaching program, and both groups received tests at 1 and 2 years. Second, NCOV-19 epidemic, many courses were cancelled and cannot be trained normally. Investigators will use feedback Annie to understand the operation status of remote students in online courses, and compare them with traditional field courses. (A1 VS B2) Third, the use of public AED for the first shock in OHCA patients were less than 10% in Taiwan. If the first shock could be saved the time, the prognosis of OHCA patients with shockable rhythm will be greatly improved. Therefore, implementing the early activation of the AED donated by our institute is much important. In the previous simulation test, it was found that the continuous education can activate the public AED 1 minute faster than the unit without training. Therefore, in the new plan, investigators Combined with the pre-hospital rescue data of the Taoyuan Fire Department, investigators will analyse the location of publicAED with the GIS and survival correlation. Fourth, investigators would apply the simulation teaching situation in the hospital to the pre-hospital: try to operate the simulation situation teaching plan of OHCA patients in various public places, so that the students can get the impression of the situation and maintain the skills.

Inclusion Criteria:

1. agree to participate in the CPR course and sign the consent form to take part in the trial for further follow-up.
2. satisfies the following age restrictions: a. Legal adult (>20 years old) or b. Underaged (12-20 years old) participants require consent form from the legal guardian.

Exclusion Criteria:

1. Not willing to participate in the trial signed the consent form
2. Inability to perform CPR in a kneeling position
3. unwilling to be tracked
4. Pregnant
5. Hands unable to perform CPR

Recipient of IGOGO AED donation project, other non-profit group and educational institutions, as well as personnel who participated in the initial and recurrent training in the Formosa Plastics Group including Nanya, Formosa Plastics and Chang Gung.