Vice minister of foreign affairs Wang Yi summoned Japanese ambassador to China, Koreshige Anami, and made a "formal representation" over Japan's reported leasing of three disputed isles in the East China Sea, state press said early Sunday. Xinhua news agency said Wang Saturday noted that the Diaoyu Islands -- also known as Senkaku in Japan and Diaoyu in China -- and adjacent islets had been a part of China since ancient times. "Any unilateral action on the islands by the Japanese side is illegal and invalid, which China will not accept," Wang said. "The Chinese government and people have the...