J and K are generally the second batch of undergraduate courses, in which J is the general class and ethnic class, and K is the counterpart enrollment of preparatory courses, folk languages and secondary vocational schools.

The second batch of undergraduate colleges and universities is just a vague concept, which refers to the second batch of universities. The situation in each province is different. For example, Anhui University of Science and Technology is admitted in two batches in other provinces, but in Anhui Province and several designated provinces, it is admitted in one (including key one and ordinary one). The difference between different batches of college entrance examination to expand materials;

1. The first batch of undergraduate institutions are national key institutions with good students. Admission to a middle school, A and B institutions have no influence on each other, but the same minimum control line is implemented. The enrollment is about 22% for liberal arts and 35% for science. One is a key undergraduate course.

2. The second batch of undergraduate courses are ordinary undergraduate colleges, in which Class A and Class B have the same two lines of admission. The enrollment is about 78% for liberal arts and 65% for science. The second is an ordinary undergraduate course.

3. The third batch of undergraduate courses are private universities established in recent years and belong to high-fee colleges. The number of people admitted to the first, second and third batches is about 30% for liberal arts and about 25% for science. Now it is the second batch.