<p>Studies show that identity cannot only be self-constructed but also be other-constructed, taking on cultural-specific features and being dynamically constructed in interaction. In cyberbullying incidents, netizens construct identities for victims and wield these images as a fist to launch their attacks. Adopting Bucholtz and Hall’s principles on identity, this paper conducts a corpus-based study of other-constructed victim identities in a Chinese cyberbullying case on Sina Weibo. Three questions are addressed: What identities are constructed for the victim by netizens? How are these identities discursively and intersubjectively constructed in cyberbullying? And what cultural norms and social practices influence the construction of these identities? Data analysis shows that three other-constructed victim identities, employing Chinese cultural and social elements under the principles of indexicality and relationality, are identified: (i) a party member who undermines the social trust; (ii) a ‘fairy’ who exhibits double standards; and (iii) a ‘good student’ who manipulates social media. This study concludes that in cyberbullying cases, netizens utilize linguistic tools including labelling, implicature, and stance staking to construct negative identities for the victim through intersubjective relations, and resort to cultural and social contexts rooted in Chinese traditions, beliefs, and values to launch attacks. This case study may hopefully shed light on the detection of cyberbullying through corpus-based analysis.</p>