An interesting article made by The Diplomat points to a major reason why there will be a contentious future in store for South Korea when dealing with China:
. . . a Xinhua piece announcing the fact that South Korea and China would discuss the ADIZ at the dialogue beginning tomorrow included the same sort of assertive language used in the general ADIZ announcement: “Any airplane that fails to follow such rules will face emergency defense measures taken by the Chinese military.” This implies that China is not ready to make any exceptions for South Korea.
The article makes the point that:
. . . What should give South Korea pause over the ADIZ is the possible imposition of such zones in the future by China, something Chinese Ministry of Defense spokesman Yang Yujun claimed was in the pipes: “China will establish other Air Defense Identification Zones at the right moment after necessary preparations are completed.” A future ADIZ off the Bohai Sea and into the Yellow Sea would have serious implications for South Korean security.
Oddly enough, that Korean naval base on Chejudo and that new flock of F-35s are looking better every day.