我需要帮助，可能由于翻译的问题我解答不出公文包密码是什么
I need help. I can't figure out the password for the briefcase, probably due to a translation issue.
You need to read the documents and their descriptions, and use the succession printed on the wall.
First Document > Second Document > Wall.
If you keep struggle, I posted a guide on Patreon some time ago.
