The interventions of the control group will receive the routine health education proposed by relevant experts in China which are chosen by the Chinese Medical Association.

The interventions of the intervention group will include routine health education. And then the participants will have individual counsel about health-promoting behaviors with a midwife and a doctor. The counseling will be based on the procedure of the health promotion model.

The health education program will be conducted on the WeChat platform. The contents of health education include 1) knowledge about how to prevent anemia during pregnancy; 2) self-care education videos such as breastfeeding; 3) online courses on how to manage weight during pregnancy, and how to keep good emotions, etc.; 4) Nutrition and lifestyle guidance; 5) knowledge about recognition and prevention of risk factors or diseases: abortion, toxic substances, premature birth. The contents of health education will be totally shared 5 times from 12 weeks to 36 weeks in the pregnancy and once a month on the platform. Every participant should reply "read" after learning the contents. if they have any questions, they can reply for "help" for further connection with health professionals.

The health literacy scale for perinatal pregnant women was used to measure the level of maternal health literacy among Chinese pregnant women.It consists of 55 items accompanied by a 5-point Likert scale. The option of forward scoring items ranges from 5= strongly agree, 4 = agree, 3= uncertain, 2 = not agree, and 1 = strongly not agree. The option of reversed rescoring items ranges from 1= strongly agree, 2 = agree, 3= uncertain, 4 = not agree, and 5 = strongly not agree. The score is collected by calculating the participant's responses that form the total score from 51 to 255. The eligibility criteria were the ratio of personal score over total score is over 80% (204 points) .Based on the previous studies, the outcomes of similar interventions were tested before the first implementation of the intervention, at three months, and at the end of the intervention.

Health Promotion Lifestyle Profile-II (HPLP-II) was widely chosen to evaluate the health behaviors of pregnant women. The Chinese version of HPLP-II was formed with 40 items with scores ranging from 1 to 4. The total scores range from 40 to 160. The higher scores , the better health-promoting behaviors.Based on the previous studies, the outcomes of similar interventions were tested before the first implementation of the intervention, at three months, and at the end of the intervention.

The Empowerment Scale for Pregnant Women was used to evaluate the empowerment of pregnant women. This scale consists of 27 items with scores ranging from 1 to 4. The total scores range from 27 to 108. The higher scores, the better empowerment. Based on the previous studies, the outcomes of similar interventions were tested before the first implementation of the intervention, at three months, and at the end of the intervention.