Shanghai Mamas is a large online social support group made up of international families living in Shanghai. Their group of 5,000 members has been providing a safe environment where parents can ask questions, provide emotional support, swap/sell baby products and meet new friends since 2006. You can find an event calendar, articles, WeChat groups and other information on their official website. The only requirement to join is that at least one parent holds non-Chinese citizenship, or very strong links to the international community. It is a non-profit group.