Charter 08 specifically demands the abolition of subversion as an criminal offense. “We should make freedom of speech, freedom of the press and academic freedom universal, thereby guaranteeing that citizens can be informed and can exercise their right of political supervision,” it says. “We should end the practice of viewing words as crimes.” Liu is also known for his efforts to help negotiate the safe exit from Tiananmen Square of thousands of student demonstrators on the night of June 3-4, 1989 when the military bloodily suppressed six week-long protests in the heart of Beijing.