里勾外连 lǐ gōu wài lián

DEFINITIONS

  1. to act from inside in coordination with attackers outside
  2. attacked from both inside and out

CHARACTERS

里 lǐ
HSK 1
unit of distance; village; lane
勾 gōu
HSK 6
hook, join, connect; entice
外 wài
HSK 2
out, outside, external; foreign
连 lián
HSK 4
join, connect; continuous; even