According to his analysis, the shortest distance between Hsinchu in Taiwan and Pingtan in Fujian province on the mainland is just 70 nautical miles. In defense terms, an air attack could therefore be launched in only three to five minutes. If Taiwan allowed regular direct flights across the Taiwan Strait, said Tang, it would have a huge impact on national security.
他分析，台灣海峽最短距離從新竹到福建平潭只有七十浬，就防衛作戰來講，縱深淺、預警短，空中奇襲只需三、五分鐘，如果貿然接受對岸飛行器直飛台灣海峽，對國防安全將造成重大衝擊。