装聋卖傻

Explanation: Deliberately pretended deaf fool. Described as knowing, pretending confused. 　　Source: Lao She, "Four Generations" Two Two of his play to their patriotism should be encouraged to tell them to resist the enemy, but how he was here to teach deaf and stupid to sell, not to the wars it? " 　　Examples: You owe me, you have to also. I have never said, you can not ~. ★ Cao Yu "Peking Man" Act II