敝帚自珍

bì zhǒu zì zhēn

to value the broom as one's own (idiom); to attach value to sth because it is one's own

a sentimental attachment

敝

bì

my (polite)

帚

zhǒu

variant of 帚[zhou3]

自

zì

(bound form) self; oneself

珍

zhēn

precious thing