Literature Reference: 策马自沙漠，长驱登塞垣。——《蓟中作》 Riding from the desert, I gallop onto the fortress wall. Source from 'Jizhong Zuo'.
塞: The fortress, the frontier stronghold.
垣: It also broadly refers to walls. In names, it carries the meanings of strength, solidity, and resilience.
Meaning: The fortress wall symbolizes guarding the frontier with unwavering resilience.