Because the number of participants in the summer camp of Hohai University is generally about 30, only about 3 people pass, so the ratio is 3: 30, that is, the ratio of outstanding campers is 1: 10.

Hohai University, referred to as "Hohai" for short, is a national key university directly under the Ministry of Education, focusing on water conservancy and engineering, with coordinated development of multiple disciplines. It was established by the Ministry of Education, the Ministry of Water Resources, the State Oceanic Administration and the People's Government of Jiangsu Province. It is the first unit in China that has the right to award doctoral, master and bachelor degrees. It is the national "world-class discipline construction university" and the national "2 165438".