A national flag-raising ceremony is held at the Tian'anmen Square in Beijing, capital of China, Oct. 1, 2017. People from across the country gathered at the square to watch the national flag-raising ceremony on the morning, marking the 68th anniversary of the founding of the People's Republic of China. (Xinhua/Luo Xiaoguang) 

A national flag-raising ceremony is held at the Tian'anmen Square in Beijing, capital of China, Oct. 1, 2017. People from across the country gathered at the square to watch the national flag-raising ceremony on the morning, marking the 68th anniversary of the founding of the People's Republic of China. (Xinhua/Luo Xiaoguang)

People take photos after a national flag-raising ceremony held at the Tian'anmen Square in Beijing, capital of China, Oct. 1, 2017. People from across the country gathered at the square to watch the national flag-raising ceremony on the morning, marking the 68th anniversary of the founding of the People's Republic of China. (Xinhua/Luo Xiaoguang)

Pigeons fly over the Tian'anmen Square after a national flag-raising ceremony in Beijing, capital of China, Oct. 1, 2017. People from across the country gathered at the square to watch the national flag-raising ceremony on the morning, marking the 68th anniversary of the founding of the People's Republic of China. (Xinhua/Li He)

A national flag-raising ceremony is held in Hong Kong, south China, Oct. 1, 2017, marking the 68th anniversary of the founding of the People's Republic of China. (Xinhua/Wang Shen)

A national flag-raising ceremony is held in Macao, south China, Oct. 1, 2017, marking the 68th anniversary of the founding of the People's Republic of China. (Xinhua/Cheong Kam Ka)