Chinese term (edited): 擇善固執,锲而不舍,精益求精,努力不懈

found in dictionaries:

choose what is good, and hold onto it;

锲而不舍
work with perseverance;

seek for greater perfection; and

make every effort tirelessly.

擇善固執：指選擇好的、正確的事去做，且堅持不變。
Choose the right thing to do and hold on to it.

「鍥」而不捨：比喻堅持到底，奮勉不懈。（相似詞：努力不懈）
Work with perseverance; never give up.

精益求精：力求技能進步再進步。
Constantly strive for perfection.