一改故辙

Explanation: Completely changed the old road used to go. Means the firm embarked on a new path. Thesaurus:  tremendous power, transform heaven and earth, change one's tune(=sing another tune), a quick and decisive turn of events for the worse, Beyond recognition, Know our mistakes and do not change, depart from one's normal behaviour, to commit one mistake after another, Spin dry transfer kun, be earth-shaking Antonym Group:  carry matters with a high hand, against heavy odds (=with heavy odds against), a great disparity in numerical strength, Nothing can be done to revive the dead or to save the dying, Best in the world, Hu to make any rash, be hopelessly outnumbered, domineer, Bizhongwogua, act wilfully and unscrupulously, Outnumbered, tyrannize, find the bean in the cake, wield absolute power in a part of a country,province, Online games it Best in the world, Hu made for the chaos, Superclass Peerless, Supergroup Peerless, Preeminent, Hard to clap with Ming