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Jyutping sei3 gau2
Pinyin sì jiǔ

Definitions (CC-CANTO)
  1. an ordinary junior member in a triad gang [colloquial]
Definitions (粵典–words.hk)
  1. 名詞、黃賭毒
    黑社會​成員
    junior member of a triad; triad soldier; literally: four nine
Definitions (Wiktionary)
  1. name
    Sijiu (a town in Taishan, Jiangmen, Guangdong, China)
Examples (Wiktionary)
  1. Mandarin
    一九二九不出手,三九四九冰上走。
    一九二九不出手,三九四九冰上走。
    • X
  2. Mandarin
    以粮食为例,一九四九年全国产粮只有二千一百几十亿斤,到一九五六年产粮达到三千六百几十亿斤,增加了将近一千五百亿斤。
    以糧食為例,一九四九年全國產糧只有二千一百幾十億斤,到一九五六年產糧達到三千六百幾十億斤,增加了將近一千五百億斤。
    yǐ liáng shí wéi lì , yī jiǔ sì jiǔ nián quán guó chǎn liáng zhǐ yǒu èr qiān yī bǎi jǐ shí yì jīn , dào yī jiǔ wǔ liù nián chǎn liáng dá dào sān qiān liù bǎi jǐ shí yì jīn , zēng jiā le jiāng jìn yī qiān wǔ bǎi yì jīn .
    • Take grain crops. In 1949, the country's output was only something over 210,000 million catties. By 1956, it had risen to more than 360,000 million catties, an increase of nearly 150,000 million catties.