On Thursday, air raid sirens echoed through Taipei as Taiwan conducted annual drills simulating a Chinese invasion, including limiting mobile internet to mimic wartime conditions.This exercise is part of Taiwan's broader Han Kuang war games, testing responses to potential attacks through both military operations and civil defense drills.Amid geopolitical tensions, President Lai Ching-te and diplomats observed emergency response measures, emphasizing international collaboration against potential regional threats. (With inputs from agencies.)