Why did China dismantle the reconnaissance plane and send it back to the United States in the 2001 collision?

China and the United States collision: April 2, 2001, a U.S. Navy ep-3e reconnaissance aircraft to make into China's outer waters, sailing along China's airspace line, to China's coastal missile bases to start the radar of the inducement, this behavior was quickly passed on to the Central Military Commission, the U.S. Army, why the small one time reconnaissance will make the military commission of the senior level of so concerned about it? The key is this ep-3e reconnaissance aircraft, this reconnaissance aircraft is the latest development of the U.S. Army's ground radar reconnaissance aircraft, which can be collected in accordance with the radar radiation degree of accurate speculation of military targets around the detailed location, which is the official understanding of the previous information. But in fact, the actual performance of the U.S. Army's reconnaissance aircraft far exceeded the official announcement of the function. The U.S. military in the previous four times sent ep-3e to China's coastal reconnaissance, China's anti-submarine anti-surveillance aircraft can not do anything about it. So it happened later in the U.S. Army 5th strutting reconnaissance mission, China's J-8 fighters without warning "was hit", U.S. pilots later recalled that rather than J-8 "was hit", the U.S. Army reconnaissance aircraft "was forced to hit". The left wing of the U.S. aircraft engine damage, forced landing in Hainan airport, and our pilots, although the safety of parachute but still "missing"

At that time, it was reported that eight military experts in Beijing by plane to Hainan, which is why the U.S. aircraft was detained by the Chinese side for more than ten days, the U.S. government has also been released after the affirmation of accusations of the U.S. military aircraft interior has been touched, and the Chinese side said that it is a "calendar row of inspection". The U.S. military also seems to understand certain things, so that the last symbolic compensation to the Chinese side of 50,000 U.S. dollars. And through this "other than the collision" and the pilot "missing", China in the anti-submarine anti-surveillance technology "by leaps and bounds", a leap of 10 years of technical difficulties. The edge of which you have your own to think about it.