The second mode refers to the simulation of two test papers. The second book is the abbreviation of the second batch of undergraduate enrollment in the national unified examination for enrollment of ordinary colleges and universities. In the past, a batch of ordinary undergraduates applied for the college entrance examination was divided into three batches, and the second batch was the second batch of ordinary undergraduates, which also refers to colleges and universities that enrolled students in the second batch.

Ordinary two universities are just a vague concept, which refers to the universities whose admission batches are placed in the second batch, and the situation in each province is different. Anhui University of Science and Technology, for example, is admitted in two batches in other provinces, but in Anhui Province and several designated provinces (including key one and ordinary one). Another example is Tianfu College of Southwestern University of Finance and Economics, which is an independent financial college. In Sichuan, Shandong, Fujian, Shanghai and other provinces, two batches of undergraduate candidates are recruited, and three batches of candidates are recruited in other provinces, so Tianfu College of Southwestern University of Finance and Economics is also two. Two such colleges include Changchun Institute of Architecture.