May 8 (UPI) -- Chinese President Xi Jinping met with Russian President Vladimir Putin Thursday in Moscow as a contingent of world leaders come to Russia as it celebrates the 80th anniversary of the end of World War II. Xi met with Putin for about four hours of talks that he described as "in-depth, friendly and fruitful," as Putin called him a "dear friend" and praised the talks as "warm and substantive." "History and reality have fully proven that the continued development and deepening of