Taiwan has reported 38 Chinese military jets flying into its air defence zone on Friday - the largest incursion by Beijing to date, APA reports citing BBC.
The defence ministry said the aircraft, including nuclear-capable bombers, entered its air defence identification zone (ADIZ) in two waves.
Taiwan responded by scrambling its jets and deploying missile systems.
China sees democratic Taiwan as a breakaway province, but Taiwan sees itself as a sovereign state.
Taiwan has been complaining for more than a year about repeated missions by China's air force near the island.
"China has been wantonly engaged in military aggression, damaging regional peace," Taiwan Premier Su Tseng-chang told reporters on Saturday.
The government in Beijing - which is marking 72 years since the founding of the People's Republic of China - has so far made no public comment.
But it has previously said such flights were to protect its sovereignty and also targeted "collusion" between Taiwan and the US.
In a statement, Taiwan's defence ministry said 25 People's Liberation Army (PLA) planes entered south-western part of the ADIZ during daylight hours, flying near the Pratas Islands atoll.
This was followed by a second wave of 13 PLA aircraft in the same area on Friday evening. They flew over waters between Taiwan and the Philippines.