真心誠意 [－－诚－]

Jyutping zan1 sam1 sing4 ji3
Pinyin zhēn xīn chéng yì

Definitions (Wiktionary)
  1. phrase, idiomatic
    genuine and sincere; from the bottom of one's heart; in real earnest
    (syn.) 真心實意, 真心真意, 真心实意