ㄑㄧㄤˊqiángㄓㄨㄥzhōngˋㄧㄡˇzìyǒuㄑㄧㄤˊqiángㄓㄨㄥzhōngㄕㄡˇshǒu

强中自有强中手
  1. 高手自然高強智慧技能無止境不可自滿自傲 見識什麼叫做強中自有強中手以後懂得謙虛」。

However strong you are, there is always someone stronger, There is always sth more to learn (applied to art or learning)​., Never be satisfied to rest on you laurels., There is no room for complacency.