Overall design, engine production phase for new fighter jet slated for 2024

Approach amounts to 1,712th intrusion into Taiwans air defense identification zone

Incursion marks 20th time Chinese warplanes have entered Taiwans identification zone this year

Ministry of National Defense refuses to comment on latest aircraft movements, says no cause for concern

Movements said to have something to do with China's submarine activity

Dirigibles to boost island country's surveillance system as China flexes military muscles