A Chinese national flag along with several regular red flags are set up at the gate of Sun Yat-sen Park (Zhongshan Park) to the west of the Tian'anmen Rostrum in celebration of the National Day of China on Oct. 1, 2015. On this day, tens of thousands of tourists flood into the Tian'anmen Square in the heart of the Chinese capital of Beijing. [Photo by Chen Boyuan / China.org.cn]