Li Wenliang, an eye doctor at Wuhan Central hospital and one of the first to raise alarm about the outbreak of COVID-19, was summoned by the local police and forced to sign a statement reprimanding his message as a groundless rumor as well as a disturbance to the public order in late December 2019. Two months later, Li died after contracting COVID-19 at his workplace, aged 33 years. This caused shock and outrage across China and Li’s Weibo (China’s equivalent of Twitter) homepage soon became an online “wailing wall,” where people mourned, condoled, and commemorated the whistleblower and complained, questioned, and protested the overstrict government policies relevant to COVID-19 pandemic. This study shows that Weibo offers a place for users to see the mundane life of Li Wenliang, express grief and frustration, and interact with each other to remember Li, whereas another super-powerful Chinese social media, WeChat, allows users to synthesize information about Li, provide analysis and criticism, and circulate the memory of Li through their social networks. Together, these two platforms helped stabilize Chinese internet users’ memory of Li as a whistleblower, a civilian hero, a martyr, and a supporter of free speech and diverse voices, distinguished from the official version. This study contributes to recent scholarly interest in understanding how the technological affordances of social media shape memory work. It also shows that even in a politically constrictive environment, such as China’s media ecology, the space for questioning and protesting still exists, though more nuanced and precarious.