"We join others in the global community in urging the Chinese government to make a full public accounting of those killed, detained or missing; to release those who have been jailed for striving to keep the memory of Tiananmen Square alive; and to end the continued harassment of demonstration participants and their families". The official Chinese government figure is 241 dead, including soldiers, and a further 7,000 injured, but independent analysts have suggest that the death toll may have reached upwards of 10,000. Estimates from human rights groups and witnesses range from several hundred to several thousand.
Commemoration of the Tiananmen events remains taboo in mainland China.
"On the 29th anniversary of the violent suppression of peaceful demonstrations in and around Tiananmen Square on June 4, 1989, we remember the tragic loss of innocent lives".
"As Liu Xiaobo wrote in his 2010 Nobel Peace Prize speech, delivered in absentia, 'the ghosts of June 4th have not yet been laid to rest'", Pompeo said referring to the Chinese dissident who died a year ago while still in custody.
Ministry spokeswoman Hua Chunying made the comments at a regular briefing in Beijing.
"No matter how impossible it seems, we must persevere, in hope that China will one day have democracy", said a 61-year-old retiree who only gave his surname Yau.
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I avoided social media for a long time purely because I was afraid, ' Tran wrote in an October 15 post. "I feel so overwhelmed". That is not what I signed up for.
Chinese students and workers occupied Beijing's Tiananmen Square for almost two months and began protests calling for the recognition of universal values such as democracy, freedom, rule of law and human rights in China, which resulted in the army's violent suppression of protesters from June 3-4.
The organisers of the vigil estimated the turnout at 115,000 people while the Hong Kong police put the figure at 17,000.
Foreigners' passports were checked by Chinese police at a checkpoint almost a kilometre from the square.
"Such a powerful proletarian dictatorship apparatus is afraid of us: the old, the sick, and the weakest and most vulnerable of our society", they wrote in a letter addressed to Chinese President Xi Jinping.
Mr Pompeo's statement is "groundlessly accusing the Chinese government and interfering in China's internal affairs".
China should enact democratic reforms and respect the democratic rights of Taiwan's 23 million people, it said.
Meanwhile, the MAC also called on China to respect the fundamental human rights of Taiwanese in the worldwide community to promote harmonious interactions between the two sides and facilitate improved cross-strait relations.