There is a certain difficulty. Nankai University, referred to as Nankai, is located in Tianjin. It is a national key university directly under the Ministry of Education of People's Republic of China (PRC) and a national "double-class" construction university. It is difficult to take the postgraduate entrance examination for environmental engineering in Nankai University. School of Environmental Science and Engineering, Nankai University, located in Nankai District, Tianjin, was founded in 1998. Its predecessor, the Department of Environmental Science, was the earliest environmental science department established by China Comprehensive University.