It can only be said that Seoul National University textbooks are not graded according to topik test, but the corresponding level is basically the same. One or two volumes can pass the elementary level, and the fourth volume can pass the intermediate level, but there are also four volumes that can pass the intermediate level without finishing learning. In fact, there is no corresponding progress between textbooks and topik. If you want to take the topik exam, you should review from the last exam, review about 5-7 sets of questions, and play a normal level, and you should pass the exam.