. 2020 Aug 27;16(15):2828–2834. doi: 10.7150/ijbs.50127

Table 1.

The 4-tiered structured psychological intervention program implementation

Tier	Psychological intervention program	Detailed implementation
The 1^st tier	Live media	The live media group launched a series of systematic and continuous mental health programs for the public called the “Mind Filling Station”, which was broadcasted on live from 8 pm to 9 pm every night through the Airing 9.14 App, twice a day.
The 2^nd tier	Hotline consultation	The consultation group provided 24/7 free consultation services by six psychological assistance hotlines (hotline number: 96008).
		Operators used a self-developed scale to collate data on documenting the source of information that callers were seeking, such as practical difficulties, sleeping problems, emotional or behavioral disturbances, diagnosis and treatment for mental diseases and psychological crisis states.
		Operators also solicited feedback from the clients immediately after the hotline consultation, using a three-option category: 1) “problem solved”, 2) “emotionally relieved”, or 3) “needs referral”.
The 3^rd tier	Online video intervention	This group utilized a remote video diagnosis and consultation system developed by the expert team of the Clinical Hospital of Chengdu Brain Science Institute, University of Electronic Science and Technology of China. Cases that were identified as 'complicated' or 'urgent' in the hotline consultation and those high-risk cases screened out by medical staff in COVID-19-designated hospitals or community-based observation spots were referred to online video intervention. Each session lasted for an average of 30 minutes or above.
	On-site crisis intervention	On-site crisis intervention was mainly provided for two groups of people ⁵, ²², ²³. The first group included infected patients, suspected cases and quarantined cases who showed signs of psychological crisis. We trained the medical staff in COVID-19-designated hospitals and social workers in community-based observation spots in Chengdu to screen out cases in need of crisis intervention. We then assessed the mental health status of these cases. Appropriate intervention strategies were selected based on prior assessment with a follow-up plan.
	On-site crisis intervention	The second group was the frontline medical staff working in COVID-19-designated hospitals. We provided them with training based on the guidelines of Anticipate, Plan and Deter (APD) ²⁴ so that they could effectively continue their job regardless.
The 4^th tier	Leading group	The leading group provided training and supervision during the entire process. They collected the feedback report of daily work of each team, hold weekly communication meeting so that they could coordinate and solve the existing problems and supervise the staff.