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Do you know how the "world's three most dangerous jobs" work on a daily basis? Do you know how the world's largest cable-stayed bridge is maintained? Do you know the error margin for constructing a sea-crossing bridge over the water? Do you know how the blades of an offshore wind turbine are installed? Have you ever heard the sound of a yellow croaker? Have you seen a live hairtail fish? Why is it said that no hairtail fish in the world is not wild, and that wild yellow croakers have already become extinct... All the answers are in the documentary *Eastward to the Sea*. The documentary consists of three episodes: *Kan Chao* (Overseeing the Tides), *Tan Hai* (Exploring the Sea), and *Cheng Feng* (Riding the Wind).