Literature Reference: 泽国三千里，羁孤万感心。——《送张中丞入台从事》 Across the vast land of three thousand miles, a lonely heart is filled with countless emotions. Source from 'Song Zhang Zhongcheng Ru Tai Congshi'.
羁: Restraint, constraint.
孤: Solitary and independent.
Meaning: Jigu conveys the loneliness and homesickness of a wanderer in a foreign land.