Re-examination training for junior college students refers to training and training students who take part in the re-examination in the selection of junior college students to enter the undergraduate level. College-upgraded students refer to the selection examination for college-upgraded students to enter the undergraduate stage, which is the examination system for college-upgraded students to enter undergraduate colleges in Chinese mainland's education system. Re-examination refers to the second examination of the examination conducted in two times. Training is to cultivate and train skilled workers and professional cadres.