Korea's civilian carriers started to submit their flight plans to China, Thursday, when they pass through Beijing's recently-expanded air defense identification zone (ADIZ).
China unilaterally declared its new ADIZ on Nov. 23, calling for all aircraft entering it to identify themselves and submit flight plans.
Initially, the Korean government advised civilian planes as well as military aircraft to ignore the Chinese demand.
However, Seoul began to soften its stance Sunday after announcing its new ADIZ that stretches southward.
In addition, Suh Seoung-hwan, the Minister of Land, Infrastructure and Transport told reporters Wednesday that it is up to civilian airplanes whether to submit their flight plans.
"It will be no problem for civilian carriers to voluntarily report to China in accordance with the Airman's Advisory," Suh said.
As a result, Korean Air started submitting its flight plans for its planes departing for Hong Kong, Bangkok and Taipei.
"We added China to the recipients of our flight plans," said an official of Korean Air.
Asiana Airline also reported its flight plans to China when its planes departed for Taipei and Manila.
On Tuesday, senior officials of the presidential office, the prime minister's office and defense, foreign affairs and transport and maritime affairs ministries gathered to discuss how to handle the newly declared zone.
During the meeting hosted by the defense ministry, participants agreed to consult with related countries on how to deal with Ieodo in the East China Sea, which is also included in the ADIZs of China and Japan.