正襟危坐 zhèng jīn wēi zuò

DEFINITIONS

  1. to sit upright and still (idiom)

CHARACTERS

正 zhèng
HSK 2
right, proper, correct
襟 jīn lapel, collar
危 wēi
HSK 4
dangerous, precarious; high
坐 zuò
HSK 1
sit; seat; ride, travel by