新官上任三把火

xīnguānshàngrènsānbǎhuǒ ㄒㄧㄣ ㄍㄨㄢ ㄕㄤˋ ㄖㄣˋ ㄙㄢ ㄅㄚˇ ㄏㄨㄛˇ

    • (of a newly appointed official) to make bold changes on assuming office (idiom)

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Saying俗语俗語

Proverb谚语諺語 · In everyday use

Literally
a new official takes office and lights three fires
Meaning
A new leader starts by making some bold moves to establish authority; also, one is full of enthusiasm at the start. Often slightly sceptical.

Sources