敝帚自珍　

◎ 敝帚自珍 bìzhǒu-zìzhēn

[everyone values things of his own;value the broomstick simply because it is one‘s own] 將破舊的掃帚視作寶物來珍惜,比喻自己的東西雖然并不好或不貴重,但自己愛惜。也作“敝帚千金”