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Jyutping lou5 zi6
Pinyin lǎo zì

Definitions (Wiktionary)
  1. noun
    Used other than figuratively or idiomatically: the 老 character.
  2. noun
    Traditional Chinese
Examples (粵典–words.hk)
  1. Cantonese
    老字号
    老字號
    lou5 zi6 hou6
    • old shop
  2. Cantonese
    呢间舖头喺香港系老字号。
    呢間舖頭喺香港係老字號。
    ni1 gaan1 pou3 tau2 hai2 hoeng1 gong2 hai6 lou5 zi6 hou6.
    • That store is an old-line brand in Hong Kong.