In response, Kang reiterated Seoul's stance that the THAAD deployment is a matter of "national defense" and called for communication to resolve the feud between the two countries.

As a part of countermeasures against North Korea's two missile provocations last month, South Korean President Moon Jae-in ordered the four additional missile launchers of the THAAD system to be deployed.

Since the decision to build a THAAD battery comprised of six launchers was announced in July last year, China has opposed its installation, saying that it could undermine its strategic security interests. 

Currently two launchers have been installed, while the remaining four have been on standby pending an environmental impact review. (Yonhap)