The events of July 5, 2009, were a "turning point" toward Xinjiang's current situation, said Nicholas Bequelin, Amnesty International's regional director for East and Southeast Asia.
The hearing came on the anniversary of the Chinese government's violent crackdown on student demonstrators who occupied Tiananmen Square in Beijing.
It was not clear whether or not Bing joined the long list of prohibited websites, or if its China service was experiencing technical difficulties.
He said that Chinese leaders characterised their long-term military modernisation programme as essential to achieving the "great power status".
Xi's two predecessors, Jiang Zemin and Hu Jintao, both served two five-year terms, but he has signalled that he has bigger ambitions.
The succession war in China escalates as the Communist Party congress beginning October 18 gets ready to choose the successor to both the Paramount Leader and Prime Minister. What this means for China
The so-called unity within the Chinese Communist Party is in tatters as all three factions are involved in a bitter feud.