In the story "Survival on Snake Island," Zhang Yong lost his wife while protecting a monitoring buoy, which led him to withdraw from the marine monitoring team. He supported his daughter by fishing. Years later, during a typhoon, he reunited with the former station chief and uncovered an ocean pollution incident. Guided by the chief, a group of people ventured into the mysterious Snake Island to uncover the secrets of ocean pollution. However, they were unaware of the lurking dangers on the island, where human nature proved more terrifying than giant snakes. Despite facing life-threatening challenges, the group ultimately safeguarded the peace of the marine habitat. Through this mission, Zhang Yong finally let go of the past, emerged from the shadows, and resumed his duty of protecting the ocean.