[gān tóu rí shàng]   

竿    头    日    上    竿头：竹竿尖头；上：上升。比喻学业进步很快。

竿头日上，gān tóu rì shàng，释义为竿头：竹竿尖头；上：上升。比喻学业进步很快。

Have an uninterrupted career of advancement

竿头一步    竿头日上    竿头直上    竿头日进