a swallow nesting on a canopy-be in a precarious position ❍ 夫子之在此也，犹燕之巢于幕上。(《左传·襄二十九年》) He lives here like a swallow which has built its nest in a tent.
燕巢幕上yan chao mu shang
a swallow nesting on a canopy (in a precarious position)
燕巢幕上yàn cháo mù shànɡ
巢：窝；幕：帷幕。燕子把窝造在帷幕上面。比喻处境十分危险。unaware of its danger, in a precarious position, in a dangerous position