Last month at Tokyo's Ueno Zoo, after receiving thousands of tearful goodbyes from Japanese fans, Xiao Xiao and Lei Lei were put on a plane bound for China - the latest symbols of the deteriorating relationship between China and Japan. The two giant Chinese pandas had to return home after Beijing announced it was taking them back, leaving Japan without any Chinese pandas for the first time in decades. Since Japan's Prime Minister Sanae Takaichi made comments that have plunged ties with China to