nǐ xiān bǎ qíngxù wěn yī wěn, qìtóu shàng zuò de juédìng shí yǒu bā jiǔ huì hòuhuǐ

你先把情绪稳一稳，气头上做的决定十有八九会后悔。

Calm your emotions down first; decisions made in anger will very likely be regretted.