In this Sunday Aug. 19, 2012 photo, anti-Japan protesters march in Harbin, in northeastern China's Heilongjiang province. An unauthorized landing by Japanese activists on a tiny island in what the Japanese call the Senkaku chain - and the Chinese call the Diaoyu - sparked an outpouring of anger and anti-Japanese protests across China and fueled calls for aggressive government action that some fear could lead to a dangerous escalation of tensions. (AP Photo)

In this Sunday Aug. 19, 2012 photo, anti-Japan protesters march in Harbin, in northeastern China's Heilongjiang province. An unauthorized landing by Japanese activists on a tiny island in what the Japanese call the Senkaku chain - and the Chinese call the Diaoyu - sparked an outpouring of anger and anti-Japanese protests across China and fueled calls for aggressive government action that some fear could lead to a dangerous escalation of tensions. (AP Photo)