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				Beijing, which claims Taiwan as Chinese territory, says it is 
				responding to what it calls "collusion" between Taipei and 
				Washington, Taiwan's main international backer and weapons 
				supplier.
 The Taiwanese Defence Ministry said four Chinese J-16s and four 
				JH-7s as well as an electronic warfare aircraft flew near the 
				Taiwan-controlled Pratas Islands in the top part of the South 
				China Sea.
 
 The air force scrambled, with "radio warnings issued and air 
				defence missile systems deployed to monitor the activity," the 
				ministry said.
 
 Chinese aircraft fly in the southwestern corner of the zone on 
				an almost daily basis, though the last such large-scale 
				incursion was on Jan. 24 when 12 Chinese fighters were involved.
 
 There was no immediate comment from China.
 
 Shortly before the ministry's statement, Taiwan announced a 
				reshuffle of senior security officials including a new, 
				U.S.-trained defence minister, to help bolster military 
				modernisation and intelligence efforts.
 
 President Tsai Ing-wen has pledged to defend the island and has 
				made modernising its armed forces a priority, including 
				developing a fleet of new submarines, buying new F-16 fighters 
				from the United States and upgrading its warships.
 
 National Security Bureau Director-General Chiu Kuo-cheng, who 
				graduated from the U.S. Army War College in 1999, would replace 
				Yen De-fa as defence minister, Presidential Office spokesman 
				Xavier Chang told reporters.
 
 The president expected Chiu to complete the next stage of 
				military reforms, including planning for "asymmetric warfare", 
				focusing on high-tech, mobile weapons designed to make any 
				Chinese attack as difficult as possible, Chang said.
 
 Chiu's old job as intelligence chief will be taken by Taiwan's 
				top China policy-maker, Chen Ming-tong, now head of the Mainland 
				Affairs Council.
 
 "The most important task of the National Security Bureau is to 
				understand and have a grasp on China," Chang said.
 
 They will take up their posts next week.
 
 China announces its 2021 military budget next month at the 
				annual meeting of parliament, a figure closely watched as an 
				indication of its strategic intentions. Last year it set a rate 
				of increase at a three-decade low as the economy wilted during 
				the COVID-19 pandemic.
 
 Chinese military expert Ni Lexiong, a retired professor at the 
				Shanghai University of Political Science and Law, said this year 
				it would likely get a big boost, partly due to the increased 
				tensions over Taiwan.
 
 "If the mainland wants to liberate Taiwan it needs to make 
				preparations for war, so we need to pump up our equipment," he 
				said.
 
 (Reporting by Ben Blanchard; Additional reporting by Beijing 
				newsroom; editing by Angus MacSwan)
 
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