Ministry of Foreign Affairs of the People's Republic of China

This was announced today by the local authorities stating that the attack was "supported by a foreign government" and that it came from the USA.
Some network equipment at the Wuhan Earthquake Monitoring Center was said to have been cyberattacked by an overseas organization, but the time of the attack was not specified, Reuters reports.

China's foreign minister Qin Gang was removed from office on Tuesday, state media reported, after not being seen in the public eye for a month.

His absence had sparked a storm of speculation that Qin, considered a confidant of President Xi Jinping, had fallen from grace or was subject to an official investigation.