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Jyutping haa6 sei3 fu2
Pinyin xià sì fǔ

Definitions (Wiktionary)
  1. name, historical
    the four fu of Fuzhou (福州), Xinghua (興化/兴化), Quanzhou (泉州) and Zhangzhou (漳州) in Fujian province
  2. name, historical
    the four fu of Gaozhou (高州), Lianzhou (廉州), Leizhou (雷州) and Qiongzhou (瓊州/琼州) in Guangdong province