Tiananmen Square is used for parades, lies between the Tian'anmen and the square. Trees line the east and west edges of the Square, but the square itself is open, with neither trees nor benches. The square is lit with large lamp posts which are fitted with video cameras. It is heavily monitored by uniformed and plain-clothes police officers. Tiananmen Square has been the site of a number of political events and student protests. Perhaps the most notable events are protests during the May Fourth Movement in 1919, the proclamation of the People's Republic of China by Mao Zedong on October 1, 1949,
Defend Tiananmen Square Headquarters through student pickets and entered the square, demonstrating the inability of the pickets to resist the army. Once the crackdown began, the responsibilities of the pickets widened to include maintaining order during the square’s evacuation, as well as physically protecting the Defend Tiananmen Square Headquarters leaders, which facilitated the escape of Chai Ling, Feng Congde, Li Lu, and Wang Chaohua. Attempting to exercise effective authority, the Headquarters established a central location so that they could create security lines and be found easily. It is important to note that the intended use of these security lines differs between the English and