ການຮັກສາ ຄວາມປອດໄພ ຢູ່ ທຽນອັນເໝິນ

Chinese paramilitary policemen man a security checkpoint on Tiananmen Square in Beijing, June 4, 2014.

Chinese paramilitary policemen chant slogans as they march at a barrack near Tiananmen Gate in Beijing, June 4, 2014.

A child holds up a Chinese national flag as he poses for a photo in front of Tiananmen Gate in Beijing, June 4, 2014.

Visitors line up for a security check to enter Tiananmen Square in Beijing, June 4, 2014.

Chinese paramilitary policemen practice their salutes at a barrack near Tiananmen Gate in Beijing, June 4, 2014.

A police car is seen in front of a giant portrait of China's late Chairman Mao Zedong in Tiananmen Square in Beijing, June 4, 2014.