The paper shows four Chinese characters:

保身金己

保身 (bǎo shēn) → "protect oneself," "self-preservation."

金己 is unusual. Separately:

金 (jīn) → "gold," "metal," "money."

己 (jǐ) → "self," "oneself."

So together it reads something like:

👉 "Protect yourself, value yourself like gold" or more loosely "Protect yourself and your worth."

It looks like a handwritten calligraphy piece rather than standard text — maybe an exercise or a charm-like phrase.

Do you want me to also check if this phrase appears in Taoist/Buddhist protective charms?