[--]

Jyutping zau1 kei4 sou3
Pinyin zhōu qí sù

Definitions (Wiktionary)
  1. noun
    cyclin

[--]

Jyutping zau1 kei4 sou3
Pinyin zhōu qī sù

Definitions (Wiktionary)
  1. noun
    cyclin