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. 2020 Dec 3;22(12):e23273. doi: 10.2196/23273

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©Qiong Wu, Yiwen Huang, Zijun Liao, Michelle Helena van Velthoven, Wei Wang, Yanfeng Zhang. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 03.12.2020.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in the Journal of Medical Internet Research, is properly cited. The complete bibliographic information, a link to the original publication on http://www.jmir.org/, as well as this copyright and license information must be included.

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The interface of the WeChat intervention: (a) log-in interface, (b) main interface, (c) feeding messages, (d) feeding competition, (e) baby growth chart, and (f) online forum.