敝帚自珍

bìzhǒuzìzhēn
  1. to value the broom as one's own (idiom); to attach value to sth because it is one's own
  2. a sentimental attachment

CEDICT

  1. (figurative) to cherish something of little value simply because it is one's own
  2. to cherish something of little value simply because it is one's own

Wiktionary

比喻东西虽不好，却因为是自己的，仍然非常珍视。参见「家有敝帚，享之千金」条。

重編國語辭典

东西虽不好，却因为是自己的，仍然非常珍视

維基詞典

Entry Composition

1 敝 bì
  1. my (polite)
  2. poor
  3. ruined
  4. shabby
  5. worn out
  6. defeated
=2 帚 zhǒu broom
=2 帚 zhǒu variant of 帚 zhǒu
3 自 zì
  1. (bound form) self; oneself
  2. from; since
  3. naturally; as a matter of course
=4 珍 zhēn
  1. precious thing
  2. treasure
  3. culinary delicacy
  4. rare
  5. valuable
  6. to value highly
=4 珍 zhēn variant of 珍 zhēn