她城太浅困不住他他情太薄锁不住她
[tā chéng tài qiăn kùn bù zhù tā tā qíng tài bó suŏ bù zhù tā]
The city she is in is not deep enough to hold him; his feelings are not strong enough to keep her locked within his affection. This expresses the idea of two people who cannot bind each other with their emotions or locations, reflecting the fragility of certain relationships.