From Christian Science Monitor (link):
A year after rocks and bottles peppered Japanese businesses and diplomatic offices in the most public anti-Japanese outbursts in urban China for decades, relations between the two largest Asian powers have, if anything, frozen further.
In a little-noticed development, Chinese leader Hu Jintao appears for the first time to be setting a clear precondition for dialogue between Japanese and Chinese leaders: the cessation of visits by Japanese leaders to Yasukuni Shrine, where 14 Japanese war criminals are enshrined.
Yet a year later, both sides have continued a steady stream of provocative rhetoric and acts. At a rare national press conference last month, Chinese foreign minister Li Zhaoxing quoted a German diplomat who called the Yasukuni Shrine visits “stupid and immoral.” When Japan officially summoned Chinese ambassador Wang Yi the next day in Tokyo, Mr. Wang refused to go – a serious diplomatic breach.
See also Wikipedia’s “China-Japan relations”