魏京生
On 31 May, the US State Department once again called upon the Chinese government to protect human rights, to end the harassment of those who took part in the Tiananmen protests, and to "fully account for those killed, detained, or missing." The Chinese foreign ministry angrily warned the US government to "stop interfering in China's internal affairs so as not to sabotage China–US relations." The US congressional committee on foreign affairs held a special hearing where US-based former Tiananmen activists Chai Ling, Yang Jianli and Wei Jingsheng were invited to testify before members of Congress.