Photo taken on May 13, 2020 shows a view of the Sun Island Scenic Area in Harbin, northeast China's Heilongjiang Province. (Xinhua/Wang Jianwei)

Aerial photo taken on May 13, 2020 shows a view of the Sun Island Scenic Area in Harbin, northeast China's Heilongjiang Province. (Xinhua/Wang Jianwei)

Tourists go sightseeing at the Sun Island Scenic Area in Harbin, northeast China's Heilongjiang Province, May 13, 2020. (Xinhua/Wang Jianwei)

Aerial photo taken on May 13, 2020 shows a view of the Sun Island Scenic Area in Harbin, northeast China's Heilongjiang Province. (Xinhua/Wang Jianwei)

Aerial photo taken on May 13, 2020 shows a view of the Sun Island Scenic Area in Harbin, northeast China's Heilongjiang Province. (Xinhua/Wang Jianwei)

Photo taken on May 13, 2020 shows a view of the Sun Island Scenic Area in Harbin, northeast China's Heilongjiang Province. (Xinhua/Wang Jianwei)