[nì qǔ shùn shǒu]   

逆    取    顺    守    逆：背叛；顺：合理。背叛国君夺取天下，遵循常理治理国家。

逆取顺守，汉语成语，指背叛国君夺取天下，遵循常理治理国家。

Retain political power by fair means after capturing it by foul

逆耳之言    逆风恶浪    逆耳利行    逆反心理    逆耳良言