China has ceased communications with U.S. forces at the regional level and has been seen positioning it’s missile systems on the mainland.
DF-26 has low-yield nuclear threshold and also the famed “Carrier Killer.” Chinese war doctrine is that the low-yield nukes would be a preclude to Taiwan invasion in order to counter potential U.S. low-yield use doctrine in the region to repel Chinese invasion of Taiwan ( practically the only way U.S. could conceivably prevent China from the taking island given China’s much greater force escalation potential in the region).
AC