The Hainan gibbon, one of the world's rarest primates, is found only in the tropical rainforests of Hainan Island. As conservation efforts deepen, more and more people are learning about this elusive, agile creature through images and articles. Among these works are those of children's author Deng Xi, who brings the rainforest to life through words—so vividly that even readers who've never seen a gibbon can almost hear its chorus at dawn leaping from the page.