Introduction to the sub tree: The sub tree, also known as Hainan magnolia, is the only tree species in the subtropical rainforest of Hainan. It is more than 200 years old. Although it is not the same tree species as the "mother tree", the strange thing is that the roots of the mother tree extend to Next to the Hainan magnolia, it looks like a kind mother holding the child's hand, so the locals also call this tree the "child tree". In addition, as long as any family gives birth to a child, they will come here. Hang bamboo sticks on the "child tree" to inform the "child tree", hoping that the children will be protected by the tree god and grow up healthily.