He holds up the switchblade. It seems like it might be a good idea to keep it just as a means of safety. Taking a weapon from someone who might use it as protection against others who might try to use some against them.

Wei Wuxian holds a finger up to his lips as he thinks he hears something. He stands up slowly, tucking that blade into his pocket. He slowly closes the safe door so that it doesn't look like it has been disturbed.

He slowly moves around, checking the room for any other exits.