Tourists take photos beside flowers at the Sun Island Scenic Area of Harbin, northeast China's Heilongjiang Province, Aug. 7, 2019. Sun Island Scenic Area of Harbin has attracted a lot of visitors to enjoy the coolness here. (Xinhua/Wang Jianwei)

Tourists take a walk beside flowers at the Sun Island Scenic Area of Harbin, northeast China's Heilongjiang Province, Aug. 7, 2019. Sun Island Scenic Area of Harbin has attracted a lot of visitors to enjoy the coolness here. (Xinhua/Wang Jianwei)

Tourists take a walk beside flowers at the Sun Island Scenic Area of Harbin, northeast China's Heilongjiang Province, Aug. 7, 2019. Sun Island Scenic Area of Harbin has attracted a lot of visitors to enjoy the coolness here. (Xinhua/Wang Jianwei)

Aerial photo taken on Aug. 7, 2019 shows a view of part of the Sun Island Scenic Area of Harbin, northeast China's Heilongjiang Province. Sun Island Scenic Area of Harbin has attracted a lot of visitors to enjoy the coolness here. (Xinhua/Wang Jianwei)

Aerial photo taken on Aug. 7, 2019 shows a view of part of the Sun Island Scenic Area of Harbin, northeast China's Heilongjiang Province. Sun Island Scenic Area of Harbin has attracted a lot of visitors to enjoy the coolness here. (Xinhua/Wang Jianwei)

Aerial photo taken on Aug. 7, 2019 shows a view of part of the Sun Island Scenic Area of Harbin, northeast China's Heilongjiang Province. Sun Island Scenic Area of Harbin has attracted a lot of visitors to enjoy the coolness here. (Xinhua/Wang Jianwei)

Aerial photo taken on Aug. 7, 2019 shows a view of part of the Sun Island Scenic Area of Harbin, northeast China's Heilongjiang Province. Sun Island Scenic Area of Harbin has attracted a lot of visitors to enjoy the coolness here. (Xinhua/Wang Jianwei)