For them, the wealth gap is an insurmountable chasm.
Tips
history
From 《左传·襄公三十一年》: '门不容车，而不可逾越。' The gate is too narrow for a chariot, yet it cannot be crossed — illustrating a boundary that is absolute regardless of size.
usage
Attributive, almost always with 的 modifying nouns like 红线 (red line), 鸿沟 (chasm), 障碍 (barrier), 界限 (boundary). Used for moral, legal, or practical limits.
