觀釁伺隙

lit. to look for holes, and observe gaps (idiom) / fig. to search out one's opponent's weak points / to look for the Achilles' heel

surname Guan

to look at / to watch / to observe / to behold / to advise / concept / point of view / outlook

Taoist monastery / palace gate watchtower / platform

quarrel / dispute / a blood sacrifice (arch.)

to wait on

to watch / to wait / to examine / to spy

to wait for the opportunity

crack / crevice / gap or interval / loophole / discord / rift