掩耳盗铃 (yǎn ěr dào líng): lit. to cover one's ears whilst stealing a bell; to deceive oneself; to bury one's head in the sand

yǎněrdàolíng

lit. to cover one's ears whilst stealing a bell; to deceive oneself; to bury one's head in the sand

Covering your own ears to steal a bell, as if that stopped others hearing. For self deception so obvious everyone else can see it.