Undergraduate graduation thesis is usually written after the topic selection is completed. If you are an engineering student, you still need to do scheme demonstration. After the scheme demonstration, we should first start drawing design, involving formula calculation, strength efficiency, modeling and simulation experiments with large software.
This process needs to be reserved for writing papers, and it is not too late to write papers after the design drawings are completed. Whether in science or engineering, writing a thesis is the beginning after the opening report is passed. Just grasp the opportunity and when to write.