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Jyutping goeng1 si1 fan2
Pinyin jiāng shī fěn

Definitions (Wiktionary)
  1. noun, Internet
    ghost follower; fake follower

殭屍粉 [僵尸-]

Jyutping
Pinyin jiāng shǐ fěn

Definitions (CC-CEDICT)
  1. "zombie fans", fake followers that can be bought to boost one's popularity on Weibo, Baidu etc