In early April of 2018, eight chinese students at Peking University filed a freedom of information request for records related to Gao Yan, a student who reportedly being sexually assaulted by a professor two decades ago and subsequently committed suicide. The university refused to disclose information, but a friend of Gao shared her story online, sparking national outcry and demands for action against sexual assault and harassment. In response, censors suppressed online discussions and removed an open later by Yu Xin, one of the students behind the request from WeChat. Despite censorship, a supporter embedded Yu's letter in the tamper proof Ethereum blockchain. To preserve and share it, the anonymous activists sent themselves zero ether on the platform and embedded the text of use open letter in the transaction. Metadata transactions on a blockchain are irreversible, so the information cannot be altered. Furthermore, transactions generate distributed copies of themselves within the network, which ensured that useletter would end up permanently documented in the public domain and accessible to any user who looked up the transaction.