Public Service Day is one of the biggest public service holidays in what region?

This is because 99 Charity Day is a public service campaign initiated by Alibaba, a Chinese Internet company, which has received widespread participation and support. As one of China's largest e-commerce companies, Alibaba has a huge user base and influence, and is able to mobilize more people to participate in public welfare activities. 99 Charity Day is not just a one-day charity event, but also has long-term charity projects and partners. Through a variety of online and offline forms, 99 Public Welfare Day can cover a wider range of regions and people, so that the influence of public welfare activities is greater.