Meanwhile, Taiwan struck a defiant tone on Wednesday as it hosted Pelosi, with a furious China gearing up for military exercises dangerously close to the island's shores in retaliation for the visit. South Korea scrambled fighters on Friday as Russian and Chinese warplanes on a joint exercise briefly entered its air defense identification zone, military chiefs in Seoul said. Taiwan’s air force scrambled again on Thursday to warn away nine Chinese aircraft that entered its air defense zone, Taiwan’s defense ministry said. Nancy Pelosi who visited Taiwan yesterday departed from the Island nation on Wednesday evening, ending a controversial landmark visit that Beijing responded to with threats and military drills. ADIZ must not be confused with Flight Information Regions (FIRs) which are areas. Justifying its action, China insisted Wednesday its military exercises around the Taiwan Strait were "necessary and just" in the wake of US House Speaker Nancy Pelosi's visit to the self-ruled island. An Air Defence Identification Zone (ADIZ) is an area in airspace over land or water which may not be over the sovereign territory of a State in which ready identification, location and control of all aircraft is required in the interest of national security. More than 20 Chinese military planes flew into Taiwans air defence zone on Tuesday, officials in Taipei said, as US House Speaker Nancy Pelosi began her controversial visit to the self-ruled. Nancy Pelosi visited Taiwan on Tuesday night despite serious warnings from Beijing threatening the United Nations of serious consequences. Nancy Pelosi Taiwan visit: 27 Chinese warplanes entered the Taiwanese air defence zone, AFP quoted Taipei as saying after US House Speaker Nancy Pelosi's visit to Island on Tuesday. China insisted its military exercises around the Taiwan Strait were "necessary and just".Chinese fighter jets crossed into Taiwan strait to showcase its disapproval to Pelosi's visit.
Nancy Pelosi visited Taiwan despite serious warnings from Beijing threatening the US East China Sea Air Defense Identification Zone that came into effect from 23 November 2013, 10 AM. On May 4, Taiwan’s Ministry of Defense reportedly confirmed that China is planning to set up an air defense identification zone (ADIZ) in the South China Sea.