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Jyutping daai6 daat3 dei2 maai6 zuk1
Pinyin dà dá dì mài zhōu

Definitions (粵典–words.hk)
  1. 語句
    歇後語​:​整定
    former half of a sandwich pun to imply 整定"predestined" (where 整定 can also mean "pre-made", just like congee sold in the flea market, as literally suggested)