People enjoy themselves during a light show held at a square in Harbin, capital of northeast China's Heilongjiang Province, May 3, 2024. (Xinhua/Zhang Tao)

People watch a light show held at a square in Harbin, capital of northeast China's Heilongjiang Province, May 3, 2024. (Xinhua/Zhang Tao)

A drone photo taken on May 3, 2024 shows a light show held at a square in Harbin, capital of northeast China's Heilongjiang Province. (Xinhua/Zhang Tao)

A visitor takes photos of a light show held at a square in Harbin, capital of northeast China's Heilongjiang Province, May 3, 2024. (Xinhua/Wang Jianwei)

People watch a light show held at a square in Harbin, capital of northeast China's Heilongjiang Province, May 3, 2024. (Xinhua/Wang Jianwei)

People watch a light show held at a square in Harbin, capital of northeast China's Heilongjiang Province, May 3, 2024. (Xinhua/Wang Jianwei)

A drone photo taken on May 3, 2024 shows a light show held at a square in Harbin, capital of northeast China's Heilongjiang Province. (Xinhua/Zhang Tao)

People watch a light show held at a square in Harbin, capital of northeast China's Heilongjiang Province, May 3, 2024. (Xinhua/Wang Jianwei)

A drone photo taken on May 3, 2024 shows a light show held at a square in Harbin, capital of northeast China's Heilongjiang Province. (Xinhua/Zhang Tao)