只此一家，別無分店 [－－－－－别无－－]

Jyutping zek3 ci2 jat1 gaa1 ， bit6 mou4 fan1 dim3
Pinyin zhǐ cǐ yī jiā ， bié wú fēn diàn

Definitions (Wiktionary)
  1. phrase, figuratively, idiomatic
    unique; unparalleled; unmatched
  2. phrase, figuratively, idiomatic
    to have a monopoly
  3. phrase, idiomatic
    the one and only store, no branch offices (you can buy something only here)