裡勾外連

to act from inside in coordination with attackers outside / attacked from both inside and out

outside / in addition / foreign / external

surname Gou

to attract / to arouse / to tick / to strike out / to delineate / to collude / variant of 鉤|钩[gou1], hook

see 勾當|勾当[gou4 dang4]

lining / interior / inside / internal / also written 裏|里[li3]

surname Lian

to link / to join / to connect / continuously / in succession / including / (used with 也[ye3], 都[dou1] etc) even / company (military)