A flag-raising ceremony is held during a grand gathering celebrating the Communist Party of China (CPC) centenary at Tian'anmen Square in Beijing, capital of China, July 1, 2021. (Xinhua/Pang Xinglei)

　　The national flag guards stand in formation during a flag-raising ceremony at a grand gathering celebrating the centenary of the Communist Party of China (CPC) at Tian'anmen Square in Beijing, capital of China, July 1, 2021. (Xinhua/Li Xin)

　　The national flag guards march during a flag-raising ceremony at a grand gathering celebrating the centenary of the Communist Party of China (CPC) at Tian'anmen Square in Beijing, capital of China, July 1, 2021. (Xinhua/Ma Ning)

　　The national flag guards march during a flag-raising ceremony at a grand gathering celebrating the centenary of the Communist Party of China (CPC) at Tian'anmen Square in Beijing, capital of China, July 1, 2021. (Xinhua/Shen Hong)

　　 A ceremony marking the centenary of the Communist Party of China (CPC) is held at Tian'anmen Square in Beijing, capital of China, July 1, 2021. (Xinhua/Lan Hongguang)

　　A ceremony marking the centenary of the Communist Party of China (CPC) is held at Tian'anmen Square in Beijing, capital of China, July 1, 2021. (Xinhua/Chen Zhonghao)

　　Military aircraft fly over Tian'anmen Square in echelons ahead of a grand gathering celebrating the Communist Party of China (CPC) centenary in Beijing, capital of China, July 1, 2021. (Xinhua/Zhang Chen)

　　Representatives of the Chinese Communist Youth League members and Young Pioneers salute the Communist Party of China (CPC) and express commitment to the Party's cause at a ceremony marking the CPC centenary at Tian'anmen Square in Beijing, capital of China, July 1, 2021. (Xinhua/Yin Bogu)

　　Military aircraft fly in echelon ahead of a grand gathering celebrating the Communist Party of China (CPC) centenary in Beijing, capital of China, July 1, 2021. (Xinhua/Li Mengjiao)

　　Military aircraft fly in echelons ahead of a grand gathering celebrating the Communist Party of China (CPC) centenary in Beijing, capital of China, July 1, 2021. (Xinhua/Chen Zhonghao)

　　Military aircraft fly in echelon ahead of a grand gathering celebrating the Communist Party of China (CPC) centenary in Beijing, capital of China, July 1, 2021. (Xinhua/Dai Tianfang)