“We have repeatedly stated our position on such groundless accusations that lack evidence,” Mao Ning said at a daily briefing. “China consistently opposes all forms of hacking, and we are even more opposed to the dissemination of false information against China for political purposes.”

The "threat actor" was able to access the workstations via a compromised third-party cybersecurity service provider called BeyondTrust, the department said.

Chinese state-sponsored hackers breached the Treasury Department's computer security guardrails this month, according to a letter to lawmakers that Treasury officials provided to Reuters.

The Biden administration revealed Monday that China-backed hackers infiltrated the U.S. Treasury Department earlier this month in what officials are calling a "major cybersecurity incident."