打頭炮 [－头－]

Jyutping daa2 tau4 paau3
Pinyin dǎ tóu pào

Definitions (CC-CANTO)
  1. verb; fire the first shot; fire the first round; the first or leading launch of something
Definitions (Wiktionary)
  1. verb, figuratively
    to be the first to speak or act