Talk to him directly, but have a good attitude and keep a low profile. Don't scold back. After letting him vent his anger, everything will be easy.

Don't worry, my friend. A master's degree is easier to get than you think.

The graduation thesis has just been answered, and the materials for the master's degree and diploma are all ready, just waiting for the certificate to be issued on graduation day.

It's not difficult to graduate with a doctorate now. Just ask anyone who has been here.