The Y-9 and Z-9 advanced farther than the fighters, entering Taiwan’s southwest air defense identification zone, the ministry said. “This time, the military exercises were launched on the same day that the announcement was made. Unlike previous ones, they did not announce in advance the coordinates of the areas where military exercises would be conducted and how long they would last. Long before the military exercises began, they were prepared to conduct cognitive, psychological and media warfare along with the military drills,” Chang said. Chinese warships would not be driven away unless they reached the median line.