The introduction of the plot of Intertwined Water and Fire, the summary of the plot introduced in episodes: Ceng Mangmang's mentor Chang Shengyuan, who has just returned from studying abroad, is an upright, responsible, gentle and deep person. The two understand and appreciate each other after long-term work exchanges. After the tempering of life and the ups and downs of feelings, will Ceng Mangmang and Chang Shengyuan be together?