一心無二

一心无二
yīxīnwú'èr

single-minded

Wiktionary

Entry Composition

1 一心 yīxīn
  1. wholeheartedly
  2. heart and soul
2 無二 wú'èr
  1. (literary) to harbour no disloyalty; to be wholeheartedly faithful
  2. to harbour no disloyalty; to be wholeheartedly faithful
  3. to have no difference; to be identical