With the rapid development of social media platforms

the circulation of K-pop in China has undergone significant changes. Compared with earlier models that relied mainly on television broadcasting

magazines

or official entertainment promotion

much of today's cross-cultural communication is mediated by fan communities. Through subtitle translation

information organization

video editing

reposting

recommendation posts

and data-oriented mobilization

fans produce a large amount of user-generated content

or UGC. These practices not only help K-pop overcome linguistic and cultural barriers

but also reshape Korean popular culture according to Chinese platform environments and local online expression.Taking SEVENTEEN fan communities as a case study

this paper examines how Chinese fans produce and circulate UGC on platforms such as Weibo and Bilibili. The study finds that SEVENTEEN fan communities have developed a relatively complete chain of content production

interpretation

circulation

and mobilization. Fans do not simply repost official materials; rather

they translate

edit

classify

narrativize

and repackage content in ways that match Chinese users' viewing habits and platform logics. This paper argues that Chinese K-pop fans function as cultural intermediaries

creative laborers

and platform participants. They play an important role in the localization of K-pop by transforming foreign popular culture into locally understandable and emotionally meaningful media content.