The DOJ press release for the Hafnium APT member is now live
He was allegedly an employee of a company named Shanghai Powerock Network while conducting the hacks... so we have a new govt contractor's name now

Justice Department Announces Arrest of Prolific Chinese State-Sponsored Contract Hacker
The Justice Department announced today that Xu Zewei (徐泽伟), 33, of the People’s Republic of China was arrested on July 3 in Italy at the request of the United States.
(www.justice.gov)