畢其功於一役

Simplified: 毕其功于一役

bìqígōngyúyīyì ㄅㄧˋ ㄑㄧˊ ㄍㄨㄥ ㄩˊ ㄧ ㄧˋ

    • to accomplish the whole task at one stroke (idiom)

Character by character

Sources