China has accused the United States of "illegally" flying high-altitude balloons into its airspace more than 10 times since January 2022, claims that drew an immediate rebuttal from the White House, as bilateral tensions flare in the fallout from a Chinese balloon that was shot down by American fighter jets after traveling across the continental US.

https://www.cnn.com/2023/02/13/china/china-unidentified-flying-object-intl-hnk-mic/index.html