Tīngshuō nǐ shēngzhí le, gōngxǐ! — Tóngxǐ, nǐ yě jiāxīn le ma.
I heard you got promoted, congrats! — Same to you, you got a raise too.
Tips
culture
The standard polite reply to 恭喜 (gōngxǐ, 'congratulations'). Especially common at 春节 (Chūnjié, Spring Festival): 恭喜发财 → 同喜同喜. Often doubled for warmth.
