In December 2011, China's largest online forum, Tianya, experienced a significant security breach in which tens of millions of user accounts were compromised. The data breach exposed a vast amount of user information, including names, usernames, and email addresses. This breach affected a massive number of accounts, with approximately 29,020,808 compromised.
Compromised data: Email addresses, Names, Usernames
Compromised data: Email addresses, Names, Usernames