School of Diplomacy
The six versions of written works from the School of Diplomacy were discovered by Liu Xiang during his editing and proofreading of the imperial literary collection. Those works of political views and diplomatic strategies from the School of Diplomacy were in poor condition, with confusing contents and missing words. Liu Xiang proofread and edited them into the new book under the title "Zhan Guo Ce"; it was therefore not written by a single author at one time.