A Taiwanese “white hat” hacker claims he’ll broadcast himself hacking Mark Zuckerberg’s Facebook page on Sunday, reports Bloomberg. Writing in a Facebook post to his 26,000 followers, Chang Chi-yuan promised to delete the Facebook founder’s account, and broadcast himself doing so on Facebook Live. Chang is a well-known hacker in Taiwan, according to Bloomberg.

Chang, and his Facebook page, are listed as a “Special Contributor” in Line Corp.’s bug bounty hall of fame for 2016, and was reportedly sued by a local bus operator for hacking into its system and buying a ticket for a single Taiwanese dollar (equivalent to 3 US cents). The hacker has also posted screenshots of Facebook’s responses to his bug reports. READ MORE