Healthy Gestational Weight Gain Programme

The investigators set diet, physical activity, and weight goals for each participant. During the lifestyle intervention period, the participants need to complete weekly self-monitoring of weight, weekly recording of diet behavioral goals, timely exercise logging, online health education course learning by using the WeChat public account. They will receive corresponding timely reminder and tailored feedback in the form of graphical illustration and text according to diet, physical activity, and weight data collected by WeChat public account and Huawei Wristband. They will receive individual face to face or telephone sessions every 2 weeks to complete health education, goal review, motivational interview as well as collecting adverse events.