Taiwan activated its defence systems on Thursday after reporting 37 Chinese military aircraft flying into the island's air defence zone, some of which then flew into the western Pacific, in Beijing's latest mass air incursion, Reuters reported.
China, which views democratically governed Taiwan as its own territory, has over the past three years regularly flown its air force into the skies near the island, though not into Taiwan's territorial air space.
Taiwan's defence ministry said that from 5 a.m. (2100 GMT on Wednesday) it had detected 37 Chinese air force planes, including J-11 and J-16 fighters as well as nuclear-capable H-6 bombers, flying into the southwestern corner of its air defence identification zone, or ADIZ.
The ADIZ is a broader area Taiwan monitors and patrols to give its forces more time to respond to threats.
Some of the Chinese aircraft flew to Taiwan's southeast and crossed into the western Pacific to perform "air surveillance and long distance navigation training", the ministry said in a statement.