Hello, the video courseware of the construction practice of the second-level constructor is available on many learning websites. If necessary, you can directly search and download it: the national book for the second-level constructor qualification examination (third edition) is a special book for the second-level constructor examination. I suggest that you buy genuine books online, review them with relevant video courseware and corresponding exercises, and master the problem-solving ideas of various types of questions. I wish you a smooth pass in the exam!