From AP, via Taipei Times (link):
Some 150 Chinese seeking action from their government on various grievances protested outside a UN office in Beijing yesterday while UN Secretary-General Kofi Annan visited China.
About 100 uniformed and plainclothes police kept the demonstrators away from the gates of the office building, which houses the UN High Commission for Refugees and other diplomatic offices. Police prevented the protesters from marching to the main UN compound two blocks away and with cajoling and mild force put most of the protesters on to a bus, ending the protest.