形於色 xíng yú sè

DEFINITIONS

  1. to show one's feelings
  2. to show it in one's face

CHARACTERS

形 xíng
HSK 5
form, shape, appearance
於 yú in, at, on; interjection alas!
色 sè
HSK 2
color, tint, hue, shade; form, body; beauty, desire for beauty