Sailors steer a two-man catamaran as their silhouettes are highlighted during the 2018 Extreme Sailing Series Qingdao Mazarin Cup. [Photo by Zhong Weihua/for chinadaily.com.cn]

Sailboats stream across the harbor of Qingdao, East China’s Shandong province. [Photo by Li Jiaxin/for chinadaily.com.cn]

Sailors steer a two-man catamaran as the boat flies above the sea during the 2018 Extreme Sailing Series Qingdao Mazarin Cup. [Photo by Song Guangchang/for chinadaily.com.cn]