别人牵驴你拔橛子

bié ren qiān lǘ nǐ bá jué zibierenqianlunibajuezi

1. lit. someone else stole the donkey; you only pulled up the stake it was tethered to (idiom)
2. fig. you're the least culpable, but you're the one who gets the blame

Study it in Yanamino