On Chinese livestream platforms (
抖音,
快手, B
站),
火箭 (rocket) is one of the most expensive virtual gifts — typically ~500
元 a pop.
刷 here means to send rapidly/in bulk. Top donors who
刷 the most rockets often get crowned
榜一大哥 (bǎngyī dàgē) 'top-ranked big brother.'
