According to online reports, Mask Network founder Suji Yan posted a message saying that today is his birthday. About three hours ago, a public wallet carried on his mobile phone was hacked and more than $4 million in assets were stolen. All stolen transactions appear to be manual and last for more than 11 minutes. Therefore, either the private key was leaked on the day of the birthday, or it could have been an offline attack. Suji Yan said that she was at a private party with more than a dozen friends. When she went to the bathroom and waited, her mobile phone left for a few minutes. But she believed in her friends, it was a nightmare for anyone. She has contacted Slow Fog and ZachXBT to assist in the investigation.