A NTNU "professor" of politics blabbered the other day on a TV talk show that the unidentified news of PLA drone(s) flying over Taiwan signifies China Mainland had been unable to afford dispatching manned planes to the island any more.  He further anticipated that next time PLA would send in planes made of paper.

Like teacher, like student.  No wonder there are so many "enlightening youth" of today in Taiwan, for they have been long "inspired" by their imbecile teacher(s).