Both are Advanced Persistent Threats
> Every election we've had in the last 14 years has had an undercurrent of Russian interference. Russia are hacking this. Russia are hacking that. Now it's China doing it? Have Russia gotten bored of us is that it?
Both have been active for years, and are called Advanced Persistent Threats (APTs) https://en.m.wikipedia.org/wiki/Advanced_persistent_threat . The article is about APT31 aka Zirconium, funded by the government of China, which has been active since 2017. https://attack.mitre.org/groups/G0128/
Here is 2020 Microsoft article about this group https://blogs.microsoft.com/on-the-issues/2020/09/10/cyberattacks-us-elections-trump-biden/ :
"Zirconium, operating from China, has attempted to gain intelligence on organizations associated with the upcoming U.S. presidential election. We’ve detected thousands of attacks from Zirconium between March 2020 and September 2020 resulting in nearly 150 compromises. Its targets have included individuals in two categories.
"First, the group is targeting people closely associated with U.S. presidential campaigns and candidates. For example, it appears to have indirectly and unsuccessfully targeted the Joe Biden for President campaign through non-campaign email accounts belonging to people affiliated with the campaign. The group has also targeted at least one prominent individual formerly associated with the Trump Administration.
"Second, the group is targeting prominent individuals in the international affairs community, academics in international affairs from more than 15 universities, and accounts tied to 18 international affairs and policy organizations including the Atlantic Council and the Stimson Center."
A news report on APT31/Zirconium does not imply that Russian or other APTs stopped activity.