Chinese Premier Wen Jiabao (rear L) and Japanese Prime Minister Shinzo Abe (rear R) watch as China's Foreign Minister Li Zhaoxing (seated L) and Japan's Foreign Minister Taro Aso sign a joint environmental declaration in Tokyo April 11, 2007. Wen arrived in Japan on Wednesday for a summit with Abe aimed at setting aside rancour over the past and focusing on ways to tame rivalry over energy and influence. [Reuters]