View of Great Wall at starry night in N China

This long-time exposure photo taken on Aug. 20, 2023 shows a section of the Great Wall built in Ming dynasty (1368-1644) under the starry night sky in north China. (Xinhua/Feng Kaihua)

This long-time exposure photo taken on Aug. 20, 2023 shows a section of the Great Wall built in Ming dynasty (1368-1644) under the starry night sky in north China. (Xinhua/Lian Zhen)

This long-time exposure photo taken on Aug. 20, 2023 shows a section of the Great Wall built in Ming dynasty (1368-1644) under the starry night sky in north China. (Xinhua/Lian Zhen)

This long-time exposure photo taken on Aug. 20, 2023 shows a section of the Great Wall built in Ming dynasty (1368-1644) under the starry night sky in north China. (Xinhua/Liu Jinhai)

This long-time exposure photo taken on Aug. 21, 2023 shows a section of the Great Wall built in Ming dynasty (1368-1644) under the starry night sky in north China. (Xinhua/Lian Zhen)

This long-time exposure photo taken on Aug. 21, 2023 shows a section of the Great Wall built in Ming dynasty (1368-1644) under the starry night sky in north China. (Xinhua/Lian Zhen)

This long-time exposure photo taken on Aug. 20, 2023 shows a section of the Great Wall built in Ming dynasty (1368-1644) under the starry night sky in north China. (Xinhua/Liu Jinhai)

This long-time exposure photo taken on Aug. 21, 2023 shows a section of the Great Wall built in Ming dynasty (1368-1644) under the starry night sky in north China. (Xinhua/Feng Kaihua)

This long-time exposure photo taken on Aug. 20, 2023 shows a section of the Great Wall built in Ming dynasty (1368-1644) under the starry night sky in north China. (Xinhua/Liu Jinhai)

This long-time exposure photo taken on Aug. 20, 2023 shows a section of the Great Wall built in Ming dynasty (1368-1644) under the starry night sky in north China. (Xinhua/Liu Jinhai)

This long-time exposure photo taken on Aug. 21, 2023 shows a section of the Great Wall built in Ming dynasty (1368-1644) under the starry night sky in north China. (Xinhua/Liu Jinhai)

This long-time exposure photo taken on Aug. 20, 2023 shows a section of the Great Wall built in Ming dynasty (1368-1644) under the starry night sky in north China. (Xinhua/Lian Zhen)