Wei Bianchi's work can be divided into many types. This book bring us the true status of nature in which lives born and died, never stop. It makes people who are oppressed open their eyes to find the beauty of lives rather. Author encourages children to learn more knowledge about nature, such as how to distinguish the trace of birds and beasts. Because these kinds of knowledge and experience will be helpful when children lost in the field. This type of books are suitable for students in senior class.