On April 28, the second day after the historical meeting between South Korean President Moon Jae-in and North Korean leader Kim Jong-un and their signing of the Panmunjom Declaration, Chinese military aircraft trespassed into the Korea Air Defense Identification Zone (KADIZ) without notifying Korea ahead of time. According to a YouTube posting from the Korean Television Station Arirang TV, the plane entered the zone at 10:44 am Korean Time. It flew close to Pohang Southeast of Korea and then headed towards Ulleungdo in Northeast Japan. The plane flew out of the zone at 2:33 pm. A Korean fighter jet was forced to monitor the movements. Beijing later claimed it was conducting normal training exercises within legal international air space. Epoch Times reported that this is the third time that Chinese military aircraft trespassed KADIZ in 2018. The last two times were on January 29 and February 27. The one on February 27, in particular, drew 10 Korean fighter jets to monitor the airspace and a complaint that the Defense Ministry of Korea sent to the Chinese Embassy in Korea. The article also mentioned that other than KADIZ, in recent months, Chinese military aircraft did the same trespassing in the southern part of Japan and in the airspace near Taiwan.
Sources:
1. Arirang TV, April 28, 2018
https:// www.youtube.com/watch?v=1h5S4i_4PV4
2. Epoch Times, April 28, 2018
http://www.epochtimes.com/gb/18/4/28/n10344780.htm