瘦田冇人耕，耕開有人爭 [－－－－－－－开－－争]

Jyutping sau3 tin4 mou5 jan4 gaang1 gaang1 hoi1 jau5 jan4 zaang1
Pinyin shòu tián mǎo rén gēng ， gēng kāi yǒu rén zhēng

Definitions (粵典–words.hk)
  1. 語句
    某樣​嘢​初時​冇​乜​人​要​、​冇​乜​人​做​，​一出​咗​名​就​個​個​都​有​興趣​爭
    something which at first is not in demand, but which later becomes very popular once someone takes as interest; literally: no one wants to work a thin field, when someone works on it everybody competes for it

瘦田冇人耕，耕開有人爭 [－－－－－－－开－－争]

Jyutping sau3 tin4 mou5 jan4 gaang1, gaang1 hoi1 jau5 jan4 zaang1
Pinyin shòu tián mǎo rén gēng1 gēng kāi yóu3ren zhēng

Definitions (CC-CANTO)
  1. describes something / someone which no one wanted at first but became popular as soon as one person started to take an interest [colloquial]