Taiwan's armed forces on Thursday recorded the approach of 51 planes and six warships of the People's Liberation Army of China (PLA) to the island, according to a daily report from Taiwan's defense ministry.

"As of 5 p.m. Aug. 18, Taiwan's armed forces have recorded the activities of 51 aircraft and six ships in sea and airspace near Taiwan," the report said.

25 aircraft crossed the so-called "midline" of the Taiwan Strait, including 12 Su-30 fighters, six J-16s, four J-10s, one Y-8 electronic warfare plane and two H-6 bombers.

According to the agency, Taiwan sent an air patrol to monitor the situation, issued radio warnings, and deployed anti-aircraft missile systems.