People attend a national flag raising ceremony at the Golden Bauhinia Square in Hong Kong, south China, Sept. 8, 2019. (Xinhua/Li Gang)

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A national flag raising ceremony is held at the Golden Bauhinia Square in Hong Kong, south China, Sept. 8, 2019. (Xinhua/Li Gang)

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People attend a national flag raising ceremony at the Golden Bauhinia Square in Hong Kong, south China, on Sept. 8, 2019. (Xinhua/Li Gang)

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People wait to attend a national flag raising ceremony at the Golden Bauhinia Square in Hong Kong, south China, Sept. 8, 2019. (Xinhua/Li Gang)

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People pose for photos after attending a national flag raising ceremony at the Golden Bauhinia Square in Hong Kong, south China, Sept. 8, 2019. (Xinhua/Li Gang)

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People attend a national flag raising ceremony at the Golden Bauhinia Square in Hong Kong, south China, Sept. 8, 2019. (Xinhua/Li Gang)

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People attend a national flag raising ceremony at the Golden Bauhinia Square in Hong Kong, south China, Sept. 8, 2019. (Xinhua/Li Gang)