8.72M accounts from Dodonew.com (dodonew.com) were exposed in this breach. Besides email addresses, it included usernames.
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In late 2011, data was allegedly obtained from the Chinese website known as Dodonew.com and contained 8.7M accounts. Whilst there is evidence that the data is legitimate, due to the difficulty of emphatically verifying the Chinese breach it has been flagged as "unverified". The data in the breach contains email addresses and user names. Read more about Chinese data breaches in Have I Been Pwned.
Source: Have I Been Pwned (CC BY 4.0)