Wang'an is a turtle town and is the place where a few green loggerhead turtles lay their eggs. Every year from May to October, the mature female turtles will always swim back to the beach where she hatched with their hopes. This is the smell and mark of her. However, due to various human factors, the habitat of the green sea turtle has been destroyed. The number of green sea turtles or other species of sea turtles is greatly reduced. It is urgent for people to understand, love and protect them. In recent years, our school has been actively developing sea turtle courses. , leading children to understand and care for sea turtles, and hoping to deeply ingrain the concept of conservation in the hearts of every child, so that this ocean that nurtures us can develop sustainably. Therefore, through this cross-field curriculum design, children can produce knowledge that they have already internalized, and lead other children to understand the green sea turtle better through reading this picture book.