Since January 2020, Elsevier has provided free English and Mandarin resources on COVID-19 via its website. It also grants permission for free access to its research in PubMed Central and other repositories. During the outbreak, online mental health services in China became crucial due to the spread of the virus and the psychological impact on medical staff and the public. In 2003, limited internet access restricted online mental health services, but with the rise of internet and 5G technology, online services became widely available. By February 2020, 72 online mental health surveys were available through WeChat, targeting various groups. A survey of 1563 medical staff found high rates of depression, anxiety, insomnia, and stress. Online mental health education through platforms like WeChat, Weibo, and TikTok was widely used, along with published mental health books. Online psychological counseling services, including cognitive behavioral therapy, were established across China. AI programs, such as Tree Holes Rescue, were used to identify at-risk individuals. These online services have facilitated public emergency interventions, improving the quality and effectiveness of mental health care during the pandemic. The study highlights the importance of online mental health services in managing the psychological impact of the outbreak. No competing interests are declared. The authors include researchers from various institutions in China. References are provided for additional information.Since January 2020, Elsevier has provided free English and Mandarin resources on COVID-19 via its website. It also grants permission for free access to its research in PubMed Central and other repositories. During the outbreak, online mental health services in China became crucial due to the spread of the virus and the psychological impact on medical staff and the public. In 2003, limited internet access restricted online mental health services, but with the rise of internet and 5G technology, online services became widely available. By February 2020, 72 online mental health surveys were available through WeChat, targeting various groups. A survey of 1563 medical staff found high rates of depression, anxiety, insomnia, and stress. Online mental health education through platforms like WeChat, Weibo, and TikTok was widely used, along with published mental health books. Online psychological counseling services, including cognitive behavioral therapy, were established across China. AI programs, such as Tree Holes Rescue, were used to identify at-risk individuals. These online services have facilitated public emergency interventions, improving the quality and effectiveness of mental health care during the pandemic. The study highlights the importance of online mental health services in managing the psychological impact of the outbreak. No competing interests are declared. The authors include researchers from various institutions in China. References are provided for additional information.