2, contingency: it will rain heavily, the road is impassable, and the degree has been lost. When time is lost, the law will be cut.

Necessity: Ku Jin's world is painful.

3.( 1) Fish belly library (2) Fire and fox singing.

4. Slogan: fraudulently claiming to be sons Fu Su and Xiang Yan; Basis: People know more about their talents than their deaths. Xiang Yan, the general of Chu, made many contributions and loved foot soldiers. The Chu people pitied him. Or think of death, or think of death. Today, I sincerely call myself Fu Su, a son, singing for the world. I should respond more positively. I have lofty ideals and revenge, keen insight into the current situation, excellent organizational and leadership skills, and superhuman talent and courage.