Just what did the Chinese expect?
South Korea and the United States said on Friday they would deploy an advanced missile defense system in South Korea to counter a threat from North Korea, drawing a sharp and swift protest from neighboring China. ...
Beijing said on Friday it lodged complaints with the U.S. and South Korean ambassadors over the THAAD decision.
China said the system would destabilize the security balance in the region without achieving anything to end the North's nuclear program. ...
"China strongly urges the United States and South Korea to stop the deployment process of the THAAD anti-missile system, not take any steps to complicate the regional situation and do nothing to harm China's strategic security interests," the foreign ministry said in a statement.
Yes, THAAD in South Korea can protect South Korea (and ROK and US forces, which will operate the system) from Chinese nuclear missiles as much as from North Korean missiles. Tough luck, that.
China has belatedly made an effort to punish North Korea. Pity nothing China has done up to now has achieved anything to end North Korea's nuclear program, eh?
China used to enjoy the discomfort that their little Pillsbury Nuke Boy gave America, Japan, and South Korea.
Now it's not so funny.