恭喜！
When to use
Use this phrase to congratulate someone on achieving something, celebrating an event like a birthday, engagement, or promotion, or any happy occasion. It's a versatile and common expression of joy.
How it works
This is a direct and complete expression of congratulations. '恭喜' (gōngxǐ) is a set phrase meaning 'congratulations.' It can be used alone as an exclamation or as a verb in a sentence.
Register and Usage
'恭喜' (gōngxǐ) is a standard and polite way to congratulate someone. It is appropriate in almost all social contexts, from casual to formal. For added emphasis or warmth, it is often repeated: '恭喜恭喜!' (Gōngxǐ gōngxǐ!).
Notes
A standard exclamation for good news.