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Jyutping haak3 ci5 wan4 lai4
Pinyin kè sì yún lái

Definitions (Wiktionary)
  1. phrase, idiomatic
    to have a lot of customers coming to a shop or business

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Jyutping haak3 ci5 wan4 loi4
Pinyin kè shì yún lái

Definitions (粵典–words.hk)
  1. 語句
    形容​幫​襯​嘅​客人​眾多
    frequented by many customers; literally: customers like clouds coming
    • 用心服務,自然客似雲來。
      用心服务,自然客似云来。
      jung6 sam1 fuk6 mou6, zi6 jin4 haak3 ci5 wan4 loi4.
      Service with a wholehearted attitude will attract lots of customers.
Examples (粵典–words.hk)
  1. Cantonese
    客似云来
    客似雲來
    haak3 ci5 wan4 loi4
    • frequented by many customers; literally: customers like clouds coming
  2. Cantonese
    用心服务,自然客似云来。
    用心服務,自然客似雲來。
    jung6 sam1 fuk6 mou6, zi6 jin4 haak3 ci5 wan4 loi4.
    • Service with a wholehearted attitude will attract lots of customers.