At that time, Guiguzi wanted to choose a country suitable for his theory among the seven countries at that time, so he sent all his disciples out to let them choose at will. Among them, Pang Juan, Sun Bin, Zhang Yi, Su Qin and Leitian appeared later. These famous historical figures caused an uproar in various countries at that time.
In fact, Guiguzi's Sect was popular at that time, not because they were so powerful, but because of the special environment at that time. Because of the weakness of the Zhou dynasty, the following vassal States conquered for years. In order to ensure their best interests, all countries should choose excellent ideas as their next guiding actions. So at that time, they were very tolerant of new ideas, and not only the ideas of legalists and strategists were particularly popular at that time.
The reason why the vertical and horizontal factions stood out was that the land annexation was serious at that time, and the number of vassal States dropped sharply from dozens at the beginning to seven chivalrous men in the Warring States. So at that time, their living environment was already in jeopardy, especially the dominance of Qin, which led to the fear of other countries. In order to protect the country from infringement, the alliance confrontation policy of strategists is extremely important. Especially in the later period, when Qin always tried to destroy the six countries, he found that the six countries had formed an iron bucket, and the general camp could not break through at all, so he made breakthroughs one by one with the thinking of vertical and horizontal cooperation. So at that time, a scene was formed in which the vertical and horizontal factions were the main ones, supplemented by other factions. In this way, when Qin reunites the whole country, there is no need for schools of vertical and horizontal cooperation to divide their own forces. Therefore, the Legalists boarded the final stage to help Qin maintain the situation at that time.