1.现代以前,人要离乡,多为在本乡的竞争中落败。“衣锦还乡”遂成异乡人共同的理想。此理想催生的群体行动,系古代大一统帝国的重要成因。2.秦国的客卿,多是六国没落贵族。他们在本国失势,便要借秦之力反攻回去,将本国权力重新洗牌。 1. In modern times, people want to leave their hometown and mostly lose in the competition of their hometown. “Homecoming ” Then into a stranger common ideal. The group action that this ideal spawned is an important cause of the ancient unification empire. 2. Qin Qing Keqing, mostly six countries declining aristocracy. If they lose power in their own country, they will have to counter-attack the power of Qin and reshuffle their own power.