This is an interesting account of how Volt Typhoon came up in a bilateral cyber dialog. I would be wary of assuming that Wang's comments here reflected a high level decision in Beijing to signal Washington.
I'm a bit skeptical because Beijing probably did not view
www.wsj.com/politics/nat...
wsj.com
Exclusive | In Secret Meeting, China Acknowledged Role in U.S. Infrastructure Hacks
A senior Chinese official linked intrusions to escalating U.S. support for Taiwan.