Intervention group
In addition to receiving the routine maternal care in the hospital, women in the intervention group were divided into 6 subgroups by similar prenatal examination times. Each subgroup consisted of 12 pregnant women and their families, and the subgroup members were fixed to form a stable intragroup relationship. Researchers promptly established WeChat online groups for each subgroup to facilitate the participation of women and their families in continuous group care.The nursing workflow for each session of the group care was implemented in 5 steps: clarifying problems, expressing emotions, setting goals, formulating plans, and evaluating results. During implementation, midwives used different methods, such as PPT presentations, model explanations, and role-playing, to carry out health education. During each offline meeting, women and their families sat in a circle. After the midwife introduced the discussion topic, women and their families expressed their opinions on the topic and shared their own experiences, and women were encouraged to take the initiative to learn, discuss topics among themselves, and practice. In the last 20 min of the session, the midwife summarized the topic and served as a health facilitator. For those who failed to participate in offline discussions on that day, midwives provided WeChat online learning services, which could be accessed at any time, to encourage women in online WeChat groups to actively express their personal opinions, perceptions, and doubts so that women in the group could deepen ties and cultivate trust among themselves.(1) In the prenatal period, 6 discussion topics were identified based on a survey result of local women’s needs for the group care in Haikou (see Table 
Themes of six sessions in the continuous group care(2) During the intrapartum period, in addition to receiving standard care as provided to the control group, women in the intervention group also receive online peer support facilitated by midwives. The midwife guided other women in the same WeChat group to provide encouragement and emotional support throughout labor and maintain communication with her during this process.(3) During the postpartum period, WeChat groups were utilized for maintaining online communication, facilitating discussions and providing guidance to women and their families. The final group session was conducted at 42 days after birth, focusing on breastfeeding and neonatal care. Subsequent to this session, continuous online discussions and communications were sustained through WeChat groups.