This book tells the story of the naughty little sun and the cute shade playing hide and seek. It describes our familiar world in an allegorical way: dynamic and static, visible and invisible, large and small, able and unable. The integration of these words and their meanings constitutes a sufficiently vast, well-rounded, integrated, and stretched world in which we live. There is both sun and shade on this planet. The story contains a philosophy of life in a relaxed and pleasant style of writing. Besides, the magnificent and majestic paintings have the characteristics of traditional Chinese painting.