China shares an almost 2500 border with Russia, there is the Eastern Border and the Western Border The Eastern Section that is about 2,485 miles in length, and the Western Section that is about 60 miles in length. so the China do not have to drive their Tanks cross in to any nato Country to get to the Ukraine,.Serbia is a neutral Country,and is not part of NATO,China has an Embassy in Serbia,.which was bombed bythe US in 1999 maybe they dont want the same thing to happen ,again,and they could have been invited by Serbia for millitary Exercise ,..

China shares an almost 2500 border with Russia, there is the Eastern Border and the Western Border The Eastern Section that is about 2,485 miles in length, and the Western Section that is about 60 miles in length. so the China do not have to drive their Tanks cross in to any nato Country to get to the Ukraine,.Serbia is a neutral Country,and is not part of NATO,.remember the US has a habit of flying into other Countries Airspace ,without being invited

China shares an almost 2500 border with Russia, there is the Eastern Border and the Western Border The Eastern Section that is about 2,485 miles in length, and the Western Section that is about 60 miles in length. so the China do not have to cross in to any nato Countries to get to the Ukraine,.