College students should prepare their graduation thesis. To tell the truth, time is not up to the students. Actually, you tell the thesis supervisor to decide when you will start. But we say that the best time to prepare papers is to start preparing next semester in junior year. At this time, the teacher will usually give you a topic, and then the school will make an opening report, because sometimes if you don't have a good project, you can only ask the teacher to give you a good project, but if you take part in some competitions and have some good projects in your hand, then you can take what you did in this competition as your graduation thesis. You must first find the teacher and get him to agree to take you. Then, in the next semester of junior year, whether it is your own topic or the topic given by the teacher, the school will give a unified report on the topic, and then you can start preparing your thesis. However, some students said that they had passed the opening report, but some students didn't have time to do papers because they were looking for a job or doing other things. Anyway, I didn't have time to do my thesis at that time, and then I did the aluminum part at home during the winter vacation, and then I did some at school. Therefore, if you want to write a paper, you can only prepare your left-hand paper after the opening report at school at the earliest. Then whatever you do in the next time is ok. Anyway, the teacher will collect the progress of the paper every once in a while. As long as you finish it before the teacher collects it, and then finally take part in the thesis defense, you only need to reduce the duplicate checking rate of your paper to the requirements of the school.