熱火朝天 rè huǒ cháo tiān

DEFINITIONS

  1. in full swing (idiom)
  2. (in a) frenzy
  3. buzzing with activity

CHARACTERS

熱 rè hot; heat; fever; restless; zeal
火 huǒ fire, flame; burn; anger, rage
朝 cháo dynasty; morning
天 tiān sky, heaven; god, celestial