"Life's Monster Fighting Manual" revolves around the struggle of small-town young man Lu Yuan in the metropolis. It depicts the urban life scene where multiple emotions such as workplace, friendship, love, and family are intertwined in a relaxed and humorous way. Lu Yuan joined a start-up company and met colleagues and friends with different personalities. Together they experienced entrepreneurial troughs, emotional ups and downs, dream collisions, and growth and transformation. Under the pressure of lovelorn, career failure, friendship crisis, family expectations and other pressures, Lu Yuan and his partners used a humorous and optimistic attitude to "fight monsters and upgrade". In the end, they each gained growth, understood the true nature of life, and achieved inner transformation. The book uses fast-paced narration, humorous language, and ups and downs of conflicts to make urban life full of fireworks and thought-provoking.