食之无味，弃之可惜

shí zhī wú wèi , qì zhī kě xīshizhiwuwei,qizhikexi

1. lit. to be hardly worth eating, but it would still be a pity to discard it (idiom)
2. fig. some things have little to no value, yet one is still reluctant to part with them

Study it in Yanamino