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Jyutping dang6 hoi1 sam1
Pinyin děng ⋯ kāi xīn

Definitions (粵典–words.hk)
  1. 語句
    祝​賀​嘅​用​語​,​指​為​嗰​個​人​感到​開心
    felicitation used at wedding, graduation, promotion, etc., meaning "I am pleased for (that person)"