改弦更张

gǎixiángēngzhāng

adopt new ways; make a fresh start

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改弦更张

gǎi xián gēng zhāng

（比喻改革制度或变更方法） refix a bowstring -- to change policy (business); make a fresh start; start afresh; start a thorough reform; mend one's ways; change one's course; turn over to new leaf; change over to new ways; cut loose from the past and make a new start; change the laws