私人物品占为己有
[sī rén wù pĭn zhàn wéi jĭ yŏu]
It directly translates as 'personal items belong only to oneself', indicating the attitude of valuing personal property, privacy and self-space, refusing to share with others, and cherishing things solely belonged to yourself. In general terms, it represents being possessive of what is yours. This netizen possibly hopes their ownership is recognized and respected.