shì bié sān rì,guā mù xiāng dài
指别人已有进步,当另眼相看。
晋 陈寿《三国志 吴志 吕蒙传》:“遂拜蒙母,结友而别”南朝 宋 裴松之注:“士别三日,即更刮目相待。”
士别三日,刮目相待复句式;作宾语、分句;含褒义。
After a scholar's absence of three days, one will see in him a man changed for the better.