四五运动
Since the right to enter the Region is a right guaranteed to Hong Kong residents only, the government has been accused of denying entry to politically sensitive persons who are not Hong Kong residents, including US-based activists in the Tiananmen Incident, Falun Gong practitioners, and Tibetian independence supporters. High-profile persons denied entry include Taiwan President Ma Ying-jeou and Jens Galschiot, the sculptor of the Pillar of Shame that commemorates the Tiananmen Square protests of 1989.