Any attempt to cross China's red line will face firm countermeasures

Editor's note: Following Washington's announcement of a record $11.1 billion arms package for China's Taiwan region, Beijing on Friday unveiled countermeasures targeting select US defense companies and senior executives. Starting Monday morning, the People's Liberation Army Eastern Theater Command launched joint drills, codenamed "Justice Mission 2025", in the Taiwan Strait and areas to the north, southwest, southeast, and east of the island. What message are these countermeasures and exercises intended to send? The China Daily editorials offer the answers.