四面楚歌 — “To be besieged on all sides”

The idiom "Sì Miàn Chǔ Gē" (四面楚歌), meaning "Chu songs on all four sides," originates from a famous historical event during the Chu-Han Contention. After a period of conflict, Xiang Yu and Liu Bang initially agreed to divide their territories. However, Liu Bang, advised by Zhang Liang and Chen Ping, decided to seize the opportunity to eliminate Xiang Yu while his forces were weakened. Liu Bang, along with his generals Han Xin, Peng Yue, and Liu Jia, converged their armies and successfully surrounded Xiang Yu's remaining forces at Gaixia (垓下, in modern-day Anhui province).

Xiang Yu's army was greatly depleted and short on provisions. One night, he was profoundly shocked and dismayed to hear songs from his homeland, Chu, being sung by Liu Bang's encircling troops from all four directions. He exclaimed, "Has Liu Bang already taken over Chu? How can there be so many Chu people in his army?" Overwhelmed by despair and losing all will to fight, he rose from his bed and drank wine with his beloved concubine, Yu Ji. They sang a sorrowful song together, and Xiang Yu wept, filling everyone present with a sense of hopelessness.

Later, Xiang Yu mounted his horse and, with only eight hundred cavalry remaining, attempted to break through the encirclement to escape. He fought his way to the Wu River (乌江), where he ultimately committed suicide.

Because of Xiang Yu's experience of hearing Chu songs from all directions, which plunged him into despair and led to his eventual defeat and demise, the idiom "Sì Miàn Chǔ Gē" is now used to describe a person or group caught in an utterly isolated and helpless situation, facing attacks, pressure, or difficulties from all directions, often implying a desperate predicament with no one to turn to for assistance.