This is a legend about the ranger in the cat world. Humans have a human world, and cats also have their own world. In the cat world, rangers are not only a spirit, but also a phenomenon. They come from the bottom of society and live in the officialdom of the imperial court. In the gap with the folk forces, he is eager to meet difficulties and does not ask for anything in return. He is the embodiment of justice. This book will outline the growth history of a ranger in the cat world.