The story begins when she was nicknamed "Little Lychee" because of her round face. Initially, she used bags of plasticine as a "secret weapon" to deal with the new world, and started a "plasticine diplomacy" full of laughter. As the grades go up, the plasticine may fade away, but the core of Little Lizhi's use of creativity, kindness, and growing courage to solve problems has never changed.
Readers will accompany Xiao Lizhi and her friends as they experience the innocence of elementary school, the youthful restlessness of junior high school, and the pressure and struggle of high school. With humorous and warm writing, the work vividly depicts all aspects of campus life: innocent friendship, precious teacher-student relationship, noisy class anecdotes, ignorant emotional buds, "struggle" and understanding with parents, and finally the thinking and growth of facing important choices in life.