"(The Defense ministry) said it had detectedmultiple waves of PLA Air Force (PLAAF) aircraft crossing into Taiwan’s southwestern air defense identification zone yesterday morning, the second consecutive day that PLAAF aircraft entered the zone."

This is a whole new level - before it was the odd plane once a week - now it's "multiple waves of aircraft". A fatal incident would seem just a matter of time. Three weeks you think? Might be about right.