Song Shuhang's reference to "old" doesn't pertain to any physical differences, but rather to the distinction in aura and temperament.
Take his current self, for instance. Although he doesn't look physically older compared to last year, the overwhelming challenges and life-altering experiences he's encountered over the past year have made him seem more weathered and mature.
Even if his appearance hasn't changed, his aura makes him seem much "older."
The "Ghost Song Shuhang" behind Daozi shared this characteristic—while he looked very similar to Song Shuhang, his demeanor seemed noticeably more mature.
Even though the "Ghost Song Shuhang" floated behind Daozi like a cloak, his presence still exuded an unmistakable sense of maturity.
A truly mature man looks composed and seasoned no matter what he does.
"Shuhang, what did you do?" The Northern Emperor immediately contacted the still-reviving Song Shuhang, his tone urgent.
