The Air Force Command issued a press release stating that it "detected and discovered J-10 and J-11 fighter jets"

The Air Force Command said today (18) that it had detected and discovered CPC J-10 and J-11 fighter jets this morning as they entered Taiwan’s southwestern airspace. After our air reconnaissance and patrol aircraft responded appropriately and implemented broadcast warnings, the aircraft flew out of our air defense identification zone (ADIZ), which is currently under normal condition.