彼此近在咫尺
[bĭ cĭ jìn zài zhĭ chĭ]
Close Yet So Far: An expression of closeness either in physical proximity or relationship-wise yet conveying a hint of unattainability or frustration. It describes that despite being very close to something or someone, it still seems out of reach, touching upon complex human emotions or situations where barriers exist despite nearness.