稳操左券左（胜）wěn cāo zuǒ quàn

稳：稳当；操：拿着，掌握。稳稳地掌握着必胜的主动权。比喻对事情有充分的把握。have the game in one’s hands, the cards are in sb.’s hands, have full assurance of success, be confident of success, be bound to succeed