At present, the domestic second - and third-tier cities are increasingly attractive to talents. It is reported that it is becoming more and more common for some of the post-90s generation to give up the "north drift" and return to their hometowns for employment and property. These people are part of a "vanishing migrant population". According to the National Bureau of Statistics, the number of floating population in China has been declining for five consecutive years after peaking at 253 million in 2014, leaving only 236 million in 2019. Behind the decline in the migrant population, students in the big cities are also competing for civil service jobs in more remote areas. To analyze the reasons, on the one hand, there are a lot of talents in big cities. The number of graduate students in some universities has exceeded the number of undergraduate students, and the recruitment demand of many units has been directly increased to graduate degree, which makes it more difficult for many students with undergraduate and graduate degrees to stay in big cities. Beijing resident population degree survey in 2019, according to data from the survey of more than 6 years of age and population involves a total of 405159 people, including 57107 college, undergraduate 79526 people, graduate student 22520 people, accounted for 14.1%, 19.6%, 5.6% of the population, if deduct off some students still in reading, and more than 60 years old or more of the population, average degree of Beijing's working-age population is extremely high. On the other hand, besides the difficulty of finding a job, another factor that makes it difficult for some graduates to stay in big cities is the cost of living. Nowadays, the salary of graduates is not high on the whole, and many of them are relatively poor when they live in first-tier cities. If they go back to their hometown, their living cost will be much lower. In particular, many strong and second-tier cities are gradually narrowing the gap with first-tier cities in all aspects, including job opportunities and infrastructure construction. This makes the employment choice of young people have a trend of change, at the same time, the role of the second - and third-tier cities recruitment plan can not be ignored.