https://www.reuters.com/article/us-southkorea-russia-aircraft-china/chinas-defense-ministry-says-china-russia-joint-air-patrols-did-not-enter-territorial-air-space-idUSKCN1UJ09B
https://www.reuters.com/article/us-southkorea-russia-aircraft-china/chinas-defense-ministry-says-china-russia-joint-air-patrols-did-not-enter-territorial-air-space-idUSKCN1UJ09B