Generally, universities will buy HowNet service, that is, you can use the campus network to log in to HowNet directly, and it doesn't cost you money to download files, or the school has an off-campus access channel, that is, you can log in to China HowNet and choose off-campus access, and find your own school after entering. If your school is open, just click in and log in with your student number and password to download it for free.