Two apparently, can play this game:
South Korea Sunday declared an expanded air defence zone that overlaps with one announced by China and covers a submerged rock disputed by the two countries, as tensions rise over competing territorial claims.
The defence ministry said its new zone, which will take effect on December 15, would cover Ieodo -- a rock in waters off its south coast which China calls Suyan.
Japan was the target of China's creeping annexation masquerading as an air defense identification zone. But South Korea got clipped.
China suddenly abandons the "everybody else does it, why can't we?" defense:
"China expresses regret over South Korea's expansion of its air defense identification zone," Foreign Ministry spokesman Hong Lei told reporters at a regular press briefing.
I'm guessing whoever drew the boundaries of China's ADIZ to jut over South Korea's just lost their corner office.