The fans organized a large-scale support campaign.
Tips
culture
应援 activities include: buying albums to boost chart rankings, funding LED billboard ads, organizing color-coded lightstick displays at concerts, streaming music videos on loop, and crowdfunding birthday projects. A core part of 饭圈 culture.
usage
Can be noun or verb. 应援色 = fandom's official color, 应援棒 = lightstick, 应援物 = fan merchandise/gifts distributed at events.