It is a spin-off of Sparrow, and the plot is roughly the same as the drama. I have always disliked Xu Bicheng in the drama version. Although she is set to be a novice agent, inexperience does not mean she is stupid. Besides, she also attended Whampoa Military Academy. I think her first attribute should be soldier, and then herself. Regarding the character of Xu Bicheng, I will try to rely on the original work (non-drama version of the novel), but the novel does not have much text, and I will also add some of my own understanding. Regarding her relationship with Tang Shanhai, according to the novel, Xu Bicheng has feelings for him, but the relationship between her and Chen Shen is not as deep as in the drama. Regarding Tang Shanhai's feelings, I personally particularly agree with the author's sentence of "turbulent but restrained".
Purpose: Make up for regrets and weave dreams