China calls Taiwan flight a 'routine exercise'

China on Wednesday derided "wild talk" from Taiwan's president as it defended a flight by its fighter jets across the traditionally respected maritime line dividing the island from the mainland last month as a routine exercise.

The rare incursion of two J-11 fighter jets over the "median line" separating the self-ruled island from China drew condemnation from Taipei at the end of March, which called the incident "intentional, reckless and provocative".

Citing remarks by Taiwan Affairs Office spokesman Ma Xiaoguang at a press briefing Wednesday, state-run China Daily said the fly-by was part of a planned routine exercise by the People's Liberation Army (PLA).

"Protecting national sovereignty and territorial integrity has been the sacred duty of the PLA, and it is in the interest of people from both sides of the straits," he said.

China has significantly stepped up diplomatic and military pressure on Taiwan since Beijing-sceptic President Tsai Ing-wen took office in 2016, including staging a series of military exercises near the island.

Dismissing Tsai's vow to forcibly expel Chinese fighter jets if they cross the median line again as "wild talk", Ma said the Taiwanese president's comments showed she was "scared."