The Longtan Waterfall roars into a deep pool from the steep hill on Laoshan Mountain, offering a refreshing scene during the scorching summer heat. [Photo by Zhao Jianpeng/Guanhai News]

The Longtan Reservoir looks like a piece of jade on Laoshan Mountain in Qingdao. [Photo by Zhao Jianpeng/Guanhai News]

A magnificent view of Longtan Reservoir Dam on Laoshan Mountain [Photo by Zhao Jianpeng/Guanhai News]

The Longtan Reservoir is surrounded by mountains and faces the sea. [Photo by Zhao Jianpeng/Guanhai News]

The Longtan Reservoir on Laoshan Mountain offers a cool destination in summer. [Photo by Zhao Jianpeng/Guanhai News]

Picturesque lucid waters and lush mountains on Laoshan Mountain in Qingdao [Photo by Zhao Jianpeng/Guanhai News]