Han Han measures water temperature at a dock in Qingdao, East China's Shandong province, June 1, 2018. The 38-year-old Han is a native of Qingdao, a coastal city famous for its beaches and beer. Han once sold copy paper and founded a mobile game company. Now, he runs a diving club and wants to have a sailboat journey with friends from Shanghai Cooperation Organization (SCO) member states. [Photo/Xinhua]

Han Han arranges nets at a dock in Qingdao, East China's Shandong province, June 1, 2018. The 38-year-old Han is a native of Qingdao, a coastal city famous for its beaches and beer. Han once sold copy paper and founded a mobile game company. Now, he runs a diving club and wants to have a sailboat journey with friends from Shanghai Cooperation Organization (SCO) member states. [Photo/Xinhua]

Han Han checks a boat at a dock in Qingdao, East China's Shandong province, June 1, 2018. The 38-year-old Han is a native of Qingdao, a coastal city famous for its beaches and beer. Han once sold copy paper and founded a mobile game company. Now, he runs a diving club and wants to have a sailboat journey with friends from Shanghai Cooperation Organization (SCO) member states. [Photo/Xinhua]