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Jyutping sam1 fun1 tai2 bun6
Pinyin xīn kuān tǐ pán

Definitions (CC-CEDICT)
  1. big-hearted and serene (idiom); contented and easygoing
Definitions (Wiktionary)
  1. phrase, idiomatic
    carefree and contented; fit and happy
    (syn.) 心廣體胖, 心广体胖