Compared with universities in first-tier cities and second-tier cities, there is obviously still a gap. Needless to say, most famous schools in China gather in first-tier cities and new first-tier cities. Even three universities, three universities in first-tier cities, often surpass three universities in third-tier cities in teaching resources. This also explains why there are many candidates every year, even if they read three books, they have to go to a big city like Beijing, Guangzhou and Shenzhen to study. This is because they think that three books in first-tier cities may also surpass three books in second-tier cities.